**APPENDIX: Estimated Quarterly Prices and Purity**

Table A.1: Estimated Quarterly Price Per Expected Pure Gram of Powder
Cocaine, Constant 2002 Dollars

  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------
           ≤ 2                                            2-10 Grams                             10-50                                  \> 50                
           Grams                                                                                 Grams                                  Grams                

           Num.    1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile

  1981Q1   55      554.08     641.33    736.24     84     267.40     322.06    367.48     126    281.13     307.86    325.12     25     184.86     215.07    237.02

  1981Q2   53      487.20     558.67    631.95     67     321.61     387.44    420.36     111    253.17     280.52    302.95     13     142.48     177.02    197.74

  1981Q3   46      368.33     437.35    515.15     52     265.30     335.53    383.01     113    245.68     272.24    304.67                                  

  1981Q4   53      462.40     541.01    638.31     49     306.55     337.54    386.30     53     232.77     261.56    294.99     6      187.35     211.46    233.78

  1982Q1   87      465.64     607.77    673.79     86     345.71     380.61    426.92     134    241.70     276.66    309.01     15     172.80     195.31    215.60

  1982Q2   65      509.70     669.05    774.21     94     292.46     324.78    365.89     91     242.07     274.79    311.51     17     146.75     183.85    204.52

  1982Q3   97      459.73     512.09    593.73     116    304.72     335.15    370.77     146    235.97     255.87    286.35     12     165.92     192.88    212.49

  1982Q4   86      502.85     574.53    643.63     72     280.44     309.31    346.08     105    220.56     261.15    293.53     8      145.77     174.12    192.68

  1983Q1   103     435.23     573.04    678.38     109    286.49     320.84    364.66     150    206.98     230.12    254.17     30     157.99     176.67    194.13

  1983Q2   54      395.30     470.46    540.26     131    280.96     325.71    379.09     183    207.64     237.20    275.65     37     144.99     163.24    181.47

  1983Q3   62      337.77     424.19    511.52     100    285.22     319.50    362.88     165    170.59     205.52    235.78     45     142.08     152.12    168.57

  1983Q4   110     327.22     419.81    480.03     145    264.19     278.04    304.65     214    158.56     187.40    203.41     44     131.61     140.78    158.57

  1984Q1   124     283.21     371.15    441.60     128    244.43     259.62    283.50     225    142.37     169.88    191.25     57     105.21     129.47    143.67

  1984Q2   99      334.38     436.72    523.74     128    210.99     244.54    287.55     225    136.68     167.24    184.98     64     109.38     130.36    143.68

  1984Q3   78      319.46     400.27    467.42     122    240.49     259.66    285.19     247    134.40     173.74    186.82     59     128.42     148.31    163.11

  1984Q4   104     314.41     394.60    461.09     142    215.80     247.14    279.67     281    126.31     169.47    198.55     60     122.57     137.97    152.93

  1985Q1   129     350.07     451.90    531.38     181    211.22     236.06    257.26     296    131.88     173.54    196.05     70     116.31     136.41    153.52

  1985Q2   167     288.37     379.12    442.79     160    216.52     245.92    266.77     326    147.85     188.35    207.56     92     126.35     142.53    157.60

  1985Q3   159     278.83     370.61    455.32     165    192.51     231.57    263.92     382    131.53     165.86    179.15     85     119.92     136.38    152.71

  1985Q4   143     257.44     356.78    421.85     142    210.51     243.43    268.46     390    128.75     154.50    173.79     122    103.67     126.02    139.46

  1986Q1   165     226.96     303.97    362.12     165    170.41     200.86    223.95     396    117.31     138.69    150.59     112    86.89      108.98    120.82

  1986Q2   172     265.19     331.01    387.77     183    162.38     192.40    214.36     368    108.75     137.45    152.96     113    86.58      107.97    122.30

  1986Q3   165     237.24     291.87    343.45     147    149.03     180.81    203.23     334    103.99     127.84    146.88     100    76.86      95.34     108.98

  1986Q4   160     219.82     260.92    287.04     126    144.31     170.16    192.56     330    89.82      118.02    139.27     128    67.14      88.48     101.66

  1987Q1   139     239.95     295.71    322.79     86     127.92     149.27    171.94     282    89.81      113.55    129.48     134    66.71      79.05     90.04

  1987Q2   96      222.38     280.86    335.13     117    123.46     152.25    168.94     407    79.12      102.84    122.23     193    62.75      81.96     94.20

  1987Q3   89      176.29     216.14    244.51     115    125.70     148.65    160.32     429    77.82      94.58     110.52     207    60.06      72.51     82.62

  1987Q4   94      157.89     209.50    253.19     111    106.77     132.96    152.20     357    63.26      83.53     94.86      178    52.80      64.75     73.11

  1988Q1   87      157.97     199.98    229.78     134    105.29     135.53    167.32     380    59.79      76.11     92.93      161    43.45      57.32     68.16

  1988Q2   117     174.82     207.95    244.17     109    107.81     137.23    166.85     354    69.63      79.32     89.57      178    53.66      61.00     67.79
  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------

**Table A.1: Estimated Quarterly Price Per Expected Pure Gram of Powder
Cocaine, Constant 2002 Dollars (Continued)**

  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------
           ≤ 2                                            2-10 Grams                             10-50                                  \> 50                
           Grams                                                                                 Grams                                  Grams                

           Num.    1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile

  1988Q3   110     205.61     282.42    299.86     124    99.75      122.89    139.22     341    57.09      72.99     84.66      241    43.76      56.54     67.20

  1988Q4   87      158.83     203.84    245.03     106    91.04      111.68    130.84     329    55.00      66.73     76.66      223    44.74      52.94     62.58

  1989Q1   79      146.09     187.51    224.33     138    84.69      110.64    130.43     377    52.75      66.04     75.23      237    43.49      52.39     58.07

  1989Q2   86      141.78     182.51    224.54     85     77.76      95.15     112.79     365    50.10      62.26     70.77      203    40.74      50.01     55.44

  1989Q3   82      162.13     210.18    242.99     87     88.75      108.98    128.51     291    51.30      65.27     74.32      253    43.26      50.60     57.87

  1989Q4   90      121.25     179.46    212.92     98     110.64     123.39    134.81     236    63.11      74.51     87.24      184    49.45      58.92     68.98

  1990Q1   95      169.35     210.89    253.67     109    100.75     124.60    139.55     226    61.80      75.35     87.69      175    61.42      66.88     72.43

  1990Q2   47      173.07     230.35    280.36     63     130.98     161.45    182.99     190    73.24      86.74     99.63      135    66.08      76.45     85.66

  1990Q3   75      206.17     278.02    328.19     77     100.09     121.53    152.23     231    77.55      93.28     112.87     170    67.91      78.49     86.23

  1990Q4   69      171.53     220.49    265.47     67     100.35     125.10    155.34     250    64.87      83.61     93.13      157    53.92      64.56     69.97

  1991Q1   143     148.14     193.55    236.74     118    88.39      106.68    127.03     334    57.34      74.27     91.71      235    50.71      61.08     72.21

  1991Q2   70      148.02     196.25    233.63     85     90.26      98.62     113.65     305    52.97      70.13     81.70      304    46.31      56.45     63.35

  1991Q3   47      170.05     215.53    263.17     96     81.64      97.96     113.58     318    49.98      65.08     74.66      287    46.01      55.07     62.57

  1991Q4   46      147.19     188.04    222.79     76     75.97      93.47     109.68     266    48.22      59.29     69.69      231    44.37      50.56     55.52

  1992Q1   69      109.13     147.31    173.65     88     69.38      85.56     102.29     278    41.69      57.56     64.87      236    36.18      45.86     49.65

  1992Q2   48      124.74     157.47    183.71     62     84.37      105.71    121.81     190    59.23      71.59     80.78      152    50.34      61.75     69.75

  1992Q3   66      111.22     147.15    176.26     59     80.82      100.07    116.00     223    44.95      61.65     76.42      221    47.82      53.95     63.88

  1992Q4   45      130.81     163.91    190.65     44     79.85      97.76     114.75     160    44.35      57.96     65.87      98     41.65      47.58     51.79

  1993Q1   44      127.33     155.08    192.83     47     87.40      97.84     109.34     99     50.63      61.71     75.65      74     40.31      48.43     56.02

  1993Q2   51      135.70     182.07    220.97     53     72.92      88.24     102.67     141    51.49      64.59     76.09      66     43.63      53.16     58.56

  1993Q3   65      106.90     134.62    157.03     54     83.66      104.24    119.84     143    53.21      64.91     74.25      96     42.74      48.42     54.32

  1993Q4   58      119.59     152.93    175.67     50     73.56      91.95     112.18     110    50.62      63.13     72.83      78     40.15      48.73     54.28

  1994Q1   50      104.91     137.83    166.94     55     73.45      89.71     100.72     139    45.22      56.87     66.57      92     39.89      45.72     52.78

  1994Q2   30      133.61     162.28    193.56     51     74.21      91.12     108.54     148    46.01      56.88     69.55      99     35.83      44.77     50.34

  1994Q3   55      113.54     139.05    162.30     45     67.10      79.70     89.60      166    42.82      57.05     64.70      147    36.95      44.14     49.95

  1994Q4   28      115.41     150.56    178.61     46     68.69      85.13     103.95     139    41.36      51.03     56.47      106    31.99      39.55     44.82

  1995Q1   30      121.22     158.67    187.60     63     57.89      70.35     81.92      136    38.49      48.39     52.42      96     36.66      42.29     46.91

  1995Q2   24      144.66     192.89    230.80     44     60.77      75.56     87.33      103    41.35      52.53     59.55      108    38.86      45.66     53.30

  1995Q3   34      145.78     191.76    232.59     55     90.46      103.53    119.05     105    57.56      69.59     72.64      104    46.14      53.64     59.52

  1995Q4   47      146.95     183.00    207.67     36     86.52      101.11    109.75     113    49.24      60.22     67.22      99     44.79      53.14     61.18
  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------

Table A.1: Estimated Quarterly Price Per Expected Pure Gram of Powder
Cocaine, Constant 2002 Dollars (Continued)

  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------
           ≤ 2                                            2-10 Grams                             10-50                                  \> 50                
           Grams                                                                                 Grams                                  Grams                

           Num.    1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile

  1996Q1   28      133.95     179.83    206.42     50     65.74      81.59     98.75      120    46.99      55.06     63.49      111    38.84      44.30     48.95

  1996Q2   46      124.59     141.69    162.38     55     81.45      92.71     100.87     140    42.31      52.12     60.41      167    36.11      44.23     48.49

  1996Q3   31      146.79     171.75    200.61     55     63.83      80.53     91.31      158    41.34      50.97     58.49      189    33.75      43.02     49.36

  1996Q4   24      96.63      107.26    123.26     46     71.14      81.69     91.74      150    38.11      44.51     49.52      148    31.66      38.82     43.92

  1997Q1   29      129.37     154.28    176.81     77     61.10      76.57     90.54      145    37.46      47.40     54.44      114    34.08      41.03     44.13

  1997Q2   55      126.21     149.00    178.33     71     68.56      84.81     98.53      98     47.42      59.50     69.84      88     45.40      52.86     60.15

  1997Q3   52      114.98     142.41    169.26     79     64.49      77.64     90.17      154    43.76      55.14     62.98      169    43.29      48.24     54.05

  1997Q4   41      112.14     137.21    151.95     57     68.95      81.83     93.24      155    36.54      46.23     55.85      156    34.12      40.89     46.10

  1998Q1   35      92.43      114.57    131.18     56     57.20      69.39     77.92      171    37.65      47.56     56.38      145    32.67      39.34     44.74

  1998Q2   34      116.13     154.91    183.91     68     67.26      78.98     93.82      163    38.25      46.55     53.62      192    31.23      37.85     45.40

  1998Q3   52      95.34      120.69    136.69     70     63.22      71.41     81.94      188    37.19      46.39     55.69      174    33.61      37.96     43.74

  1998Q4   44      119.57     138.18    160.58     55     82.08      95.08     107.28     147    37.62      47.58     58.11      159    31.70      39.20     44.67

  1999Q1   89      114.72     145.02    168.52     87     77.34      92.74     109.58     134    40.60      48.19     55.90      108    40.03      46.39     51.55

  1999Q2   36      91.62      118.14    141.79     70     63.00      77.05     88.43      133    41.05      52.91     64.15      161    36.83      44.03     50.05

  1999Q3   67      106.45     135.69    160.26     55     66.45      77.67     85.01      185    41.33      50.26     59.74      239    34.73      41.00     45.46

  1999Q4   39      111.15     143.18    167.09     65     68.55      82.10     90.85      146    37.50      49.29     55.16      124    37.24      42.65     47.69

  2000Q1   53      131.68     160.42    171.63     71     75.57      89.44     105.20     130    42.97      54.30     64.19      115    40.18      49.44     56.78

  2000Q2   37      109.92     146.85    174.09     60     85.63      95.44     105.92     151    51.82      61.67     72.63      174    43.50      53.37     59.95

  2000Q3   30      176.68     203.21    241.12     62     73.67      93.73     109.35     179    42.97      54.68     63.18      170    38.92      46.67     50.74

  2000Q4   41      106.76     134.63    156.82     66     105.44     119.01    132.26     167    37.96      50.39     59.86      114    37.04      42.61     49.18

  2001Q1   41      128.20     166.44    198.40     81     71.95      90.56     102.39     190    47.34      53.70     59.83      184    38.62      44.87     49.31

  2001Q2   21      122.01     151.70    181.00     63     81.70      90.13     103.92     167    42.93      54.55     63.46      185    36.15      44.03     48.75

  2001Q3   17      143.64     179.85    211.01     41     57.45      72.08     82.30      130    40.00      53.04     61.28      180    36.19      43.50     50.47

  2001Q4   20      138.63     175.15    205.47     38     59.42      72.77     82.01      100    42.06      54.65     62.19      133    38.32      47.08     53.37

  2002Q1   23      110.97     134.08    163.00     60     59.67      74.29     85.75      120    40.45      51.69     59.39      155    36.00      43.21     50.47

  2002Q2   21      79.96      105.61    127.57     60     72.60      80.02     88.88      102    40.63      48.51     52.38      197    35.14      42.75     45.52

  2002Q3   22      121.02     152.81    175.04     43     60.98      75.50     85.27      145    37.70      44.54     49.92      208    34.41      40.25     46.81

  2002Q4   26      80.18      105.64    128.23     44     54.94      67.63     78.28      115    36.90      44.32     52.15      135    34.88      40.13     48.26

  2003Q1   27      92.79      118.96    136.30     72     53.84      68.08     75.63      163    35.61      42.62     51.09      134    33.46      39.94     46.71

  2003Q2   13      82.18      94.12     107.33     19     59.84      72.97     83.40      101    37.09      45.71     53.71      89     30.55      35.97     40.06
  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).
Prepared by: RAND Corporation, February 2004.

######## Table A.2

**Estimated Quarterly Price Per Expected Pure Gram of Crack Cocaine**

**Constant 2002 Dollars**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ---------- ---------------
           ≤ 1                                    1-15                                    \> 15                                   \>15 Grams
           Gram                                   Grams                                   Grams                                   

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^      

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   

  1986Q1   25     297.74     405.85    520.22     8       156.99     172.65    193.86     8       108.73     123.00    140.18     

  1986Q2   53     252.99     340.46    436.29     24      143.93     164.64    193.73     7       108.16     126.34    141.63     

  1986Q3   59     229.01     319.82    407.12     22      137.75     158.03    183.12     8       96.06      113.49    129.21     

  1986Q4   32     222.57     300.30    378.58     15      181.14     201.55    233.52     7       79.37      90.25     102.91     

  1987Q1   40     353.41     484.72    596.71     16      167.95     186.74    218.34     14      82.44      94.18     107.09     

  1987Q2   67     236.17     316.92    395.19     33      120.36     153.09    185.02     38      92.32      105.48    119.02     

  1987Q3   100    213.84     295.54    371.62     99      116.38     129.35    146.82     15      60.25      68.25     78.11      

  1987Q4   127    151.43     203.28    255.68     27      106.21     120.09    142.66     24      66.39      71.83     80.26      

  1988Q1   115    165.13     214.58    280.87     39      87.07      95.03     113.02     21      71.83      81.36     92.60      

  1988Q2   179    174.73     220.89    283.61     49      93.21      103.94    126.10     34      62.48      70.61     81.81      

  1988Q3   232    156.84     222.21    290.83     81      102.69     122.24    141.80     66      54.93      66.33     78.92      

  1988Q4   274    185.75     254.34    319.78     69      92.25      112.85    131.45     46      59.06      66.67     77.33      

  1989Q1   282    151.24     199.58    258.22     76      88.75      97.32     112.44     72      54.46      64.09     74.62      

  1989Q2   407    162.43     218.93    256.07     103     84.35      90.59     106.41     79      52.07      62.92     73.29      

  1989Q3   315    134.28     193.85    246.95     116     80.30      95.23     112.95     102     51.96      60.65     68.56      

  1989Q4   214    129.92     179.02    212.74     56      89.20      101.65    117.59     55      71.22      79.44     88.66      

  1990Q1   290    161.63     211.61    255.67     88      106.12     117.34    133.24     82      80.76      90.97     98.75      

  1990Q2   205    208.16     270.04    314.46     87      122.17     156.68    190.98     64      93.80      109.71    123.54     

  1990Q3   338    208.20     278.71    351.53     117     123.37     146.58    174.10     95      97.85      106.73    118.30     

  1990Q4   244    177.99     258.36    334.24     125     118.32     131.33    159.58     75      73.97      82.95     93.04      

  1991Q1   329    179.85     234.30    299.41     167     113.40     127.92    145.29     142     68.01      77.74     84.31      

  1991Q2   342    156.09     217.09    275.94     167     104.08     115.96    133.47     199     64.77      75.11     83.74      

  1991Q3   327    151.27     202.38    253.11     115     77.09      96.19     117.54     181     60.55      72.52     79.25      

  1991Q4   271    113.82     152.64    192.17     148     78.36      90.94     106.68     149     58.75      64.29     71.03      

  1992Q1   236    135.92     187.98    219.57     219     66.23      87.80     103.65     186     51.64      61.63     70.56      

  1992Q2   209    187.80     244.84    308.71     152     103.57     114.35    133.30     133     65.70      75.66     85.03      

  1992Q3   216    151.25     216.65    282.56     243     90.36      103.57    121.24     207     59.24      68.79     77.43      

  1992Q4   178    123.66     177.28    215.11     178     88.32      101.95    116.12     165     48.12      61.02     71.62      

  1993Q1   148    138.49     179.77    224.80     161     78.81      97.43     118.56     129     54.90      63.29     72.15      

  1993Q2   138    139.73     186.36    235.82     195     86.42      101.52    116.07     159     65.95      74.80     83.09      

  1993Q3   105    124.45     162.59    204.58     177     85.87      103.05    119.37     166     55.32      64.28     73.09      

  1993Q4   126    127.75     185.93    232.48     192     70.45      90.12     110.52     136     48.28      60.81     69.82      

  1994Q1   111    139.31     184.08    228.65     217     62.13      81.01     94.65      189     52.13      59.28     66.48      

  1994Q2   122    123.12     176.50    210.01     250     68.95      90.27     110.24     177     48.12      59.52     68.83      

  1994Q3   173    114.46     169.95    199.70     327     66.68      84.47     96.50      269     51.82      58.04     66.02      

  1994Q4   86     111.20     167.32    202.80     304     62.73      78.72     95.06      268     45.00      54.51     62.00      
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ---------- ---------------

######## Table A.2

**Estimated Quarterly Price Per Expected Pure Gram of Crack Cocaine**

**Constant 2002 Dollars (Continued)**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 1                                    1-15                                    \> 15                        
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1995Q1   92     112.76     163.99    211.71     369     59.19      78.16     91.12      297     45.72      54.34     60.91

  1995Q2   126    123.73     166.64    201.50     238     67.07      85.05     97.07      205     49.37      56.72     64.14

  1995Q3   195    135.86     179.10    210.13     216     93.65      99.43     111.08     189     52.84      63.87     70.65

  1995Q4   127    181.16     217.74    258.05     207     68.38      86.43     100.31     180     55.61      62.53     70.25

  1996Q1   111    113.15     153.33    185.42     294     70.58      81.27     92.35      254     48.15      55.94     64.26

  1996Q2   142    110.76     148.51    180.71     303     66.13      76.20     82.95      304     46.35      54.84     61.17

  1996Q3   132    130.58     169.48    191.40     302     73.27      78.99     89.99      306     44.23      52.35     60.43

  1996Q4   182    134.89     178.15    223.74     348     70.38      80.43     91.90      264     47.39      53.98     60.71

  1997Q1   198    120.42     165.55    209.04     350     70.73      78.73     90.58      332     41.34      53.59     62.04

  1997Q2   190    179.71     234.48    298.72     322     93.30      102.67    118.61     252     56.53      67.71     75.02

  1997Q3   187    144.38     189.33    233.98     325     84.02      90.20     98.95      402     52.83      60.82     71.67

  1997Q4   98     147.84     192.17    237.18     271     76.09      82.60     92.38      317     45.08      52.87     60.67

  1998Q1   103    125.26     169.82    215.35     338     65.67      74.85     85.00      392     44.86      53.62     62.65

  1998Q2   162    125.43     165.61    197.74     312     70.08      77.12     88.98      398     45.43      51.53     58.49

  1998Q3   161    114.44     146.31    170.08     339     74.15      78.62     87.64      357     44.95      50.23     55.76

  1998Q4   196    116.47     162.50    196.66     333     70.81      78.78     89.82      301     44.17      54.27     62.95

  1999Q1   246    187.84     256.25    299.10     350     77.14      95.92     109.73     246     62.20      67.85     78.03

  1999Q2   262    134.70     193.93    235.11     385     75.93      83.54     98.16      330     53.18      58.75     66.84

  1999Q3   363    125.27     181.67    232.29     441     66.20      81.08     97.44      393     48.30      55.94     62.41

  1999Q4   299    139.29     189.46    224.75     443     72.11      88.98     104.15     291     47.23      55.44     60.61

  2000Q1   309    158.15     214.16    242.75     517     85.26      99.46     117.01     296     56.53      67.50     76.43

  2000Q2   307    185.69     232.64    286.98     478     86.22      95.86     108.35     421     57.79      66.43     75.58

  2000Q3   211    157.37     215.77    266.28     476     84.76      99.24     112.00     483     54.94      62.80     71.63

  2000Q4   271    159.43     211.64    254.97     412     75.65      96.49     111.77     339     49.09      57.49     66.20

  2001Q1   228    165.15     227.09    277.27     526     72.31      91.98     108.25     424     52.74      61.37     70.41

  2001Q2   286    139.04     182.80    231.12     488     71.29      90.48     107.25     458     56.28      62.77     71.89

  2001Q3   183    136.33     182.10    218.00     390     70.06      84.56     97.19      379     48.81      57.99     67.94

  2001Q4   244    154.31     201.44    244.70     253     86.22      89.07     98.43      246     54.95      62.79     73.43

  2002Q1   207    131.95     191.45    245.22     394     65.81      79.69     93.34      409     53.37      57.99     65.22

  2002Q2   169    128.36     165.26    204.09     353     78.68      87.43     101.27     460     51.49      57.68     66.25

  2002Q3   132    121.48     165.23    191.51     354     73.32      80.74     93.32      438     47.43      53.12     60.62

  2002Q4   124    131.51     169.65    209.49     255     69.58      74.87     86.46      286     44.56      50.42     56.32

  2003Q1   111    156.20     220.10    282.08     327     56.91      74.41     88.15      377     42.07      48.03     54.29

  2003Q2   96     118.83     159.63    201.06     222     59.79      73.72     90.99      245     39.16      46.91     53.88
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004.

**Table A.3**

**Estimated Quarterly Price Per Expected Pure Gram of Heroin**

**Constant 2002 Dollars**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
            ≤ 1                                   1-10                                    \>10                         
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1981Q1   110    1138.04    2309.35   3087.25    89      1041.37    1587.34   1601.86    69      968.66     1355.43   1684.14

  1981Q2   99     1236.24    1991.45   2427.00    81      972.76     1866.77   2137.70    79      637.20     815.81    1012.45

  1981Q3   111    1233.85    1893.89   2721.15    103     767.15     1747.10   1957.41    70      929.73     1188.42   1520.82

  1981Q4   159    1295.18    1703.25   2097.00    68      716.68     1478.85   1581.55    42      503.78     670.76    792.78

  1982Q1   142    1242.93    1639.73   2018.08    147     687.79     1241.08   1264.09    68      501.94     634.83    803.40

  1982Q2   125    904.91     1435.82   1771.55    90      784.00     1370.74   1344.97    75      598.30     806.01    1040.23

  1982Q3   137    1470.14    1715.54   2112.35    93      440.47     1219.22   1245.01    61      476.38     700.74    920.64

  1982Q4   57     1015.28    1559.67   1958.33    62      490.92     1074.65   1091.20    44      777.99     836.37    1062.11

  1983Q1   88     1156.59    1615.04   1849.95    85      990.25     1812.22   2069.15    54      650.42     836.36    1090.23

  1983Q2   69     1239.41    1899.66   2427.50    66      871.43     1583.98   1617.45    55      541.42     757.55    943.61

  1983Q3   82     879.28     1368.15   1633.23    89      1013.32    1535.45   1406.85    84      627.29     848.48    1015.95

  1983Q4   59     1026.74    1623.48   2008.58    52      591.89     1182.86   1291.74    43      367.80     462.13    589.66

  1984Q1   60     1223.49    1587.44   1780.83    53      947.43     1564.86   1592.90    60      637.56     775.53    882.47

  1984Q2   59     1233.93    1714.22   2030.80    48      694.09     1353.60   1550.73    53      501.17     676.39    724.44

  1984Q3   58     856.14     1382.74   1656.35    69      793.07     1644.99   1866.05    64      509.04     658.22    807.35

  1984Q4   44     809.14     1189.17   1467.15    37      673.94     1199.69   1185.29    60      565.76     750.60    902.02

  1985Q1   61     943.73     1423.86   1783.60    75      793.80     1259.41   1440.19    61      429.41     549.83    710.29

  1985Q2   46     787.52     1230.01   1517.45    67      618.66     1302.41   1496.02    76      451.91     609.24    683.71

  1985Q3   53     715.45     1180.69   1372.88    71      531.13     1209.52   1345.26    84      565.52     700.64    848.36

  1985Q4   55     1039.16    1572.06   1935.48    43      353.49     742.66    791.61     65      664.60     762.03    849.28

  1986Q1   61     1031.74    1303.25   1535.68    54      433.39     811.62    853.17     91      473.27     652.55    796.63

  1986Q2   51     1175.50    1498.32   1881.05    51      485.23     839.06    768.09     64      480.66     560.27    679.63

  1986Q3   53     778.18     1228.88   1506.23    30      520.67     916.76    1032.88    55      654.53     724.78    833.93

  1986Q4   32     990.83     1379.04   1566.38    18      877.81     1519.16   1550.33    60      567.99     687.40    758.26

  1987Q1   38     1064.29    1417.06   1728.03    28      608.72     1217.30   1287.01    66      739.37     915.37    985.56

  1987Q2   44     902.64     1207.99   1427.63    36      615.94     1167.21   1088.77    60      610.92     719.76    860.76

  1987Q3   52     654.93     1070.56   1257.28    37      637.26     1196.28   1346.14    63      677.50     735.97    811.14

  1987Q4   92     772.01     1224.90   1555.70    59      452.90     791.59    750.78     60      547.58     645.98    757.68

  1988Q1   86     721.27     1068.53   1513.55    45      433.14     810.90    835.09     77      352.22     488.39    560.78

  1988Q2   143    635.90     1076.25   1163.38    43      429.25     821.88    1009.93    71      428.14     517.80    565.34
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.3**

**Estimated Quarterly Price Per Expected Pure Gram of Heroin**

**Constant 2002 Dollars (Continued)**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
            ≤ 1                                   1-10                                    \>10                         
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1988Q3   114    662.46     1041.92   1278.90    64      632.60     1036.38   1026.95    74      469.04     543.30    657.07

  1988Q4   86     651.28     988.43    1204.40    49      486.20     854.49    912.71     51      398.77     496.05    539.70

  1989Q1   66     581.78     866.53    1065.93    47      464.23     750.40    701.49     53      466.15     530.50    574.00

  1989Q2   56     632.59     927.89    1174.75    33      374.96     792.30    950.30     59      398.80     476.13    568.31

  1989Q3   85     544.18     947.09    1178.80    54      351.47     628.74    709.68     79      372.41     465.94    572.01

  1989Q4   58     633.67     994.35    1332.18    39      356.80     604.02    628.71     71      446.23     470.81    533.28

  1990Q1   102    688.10     1059.32   1330.18    49      515.53     978.74    1039.32    58      464.70     605.46    739.86

  1990Q2   113    569.18     857.02    1079.13    28      474.35     803.35    917.99     69      559.34     603.08    677.14

  1990Q3   88     745.41     1142.59   1459.30    45      584.22     1031.42   1089.56    57      487.71     609.59    705.57

  1990Q4   100    527.79     731.88    886.85     25      521.71     832.76    877.48     48      588.50     771.71    907.51

  1991Q1   173    503.97     914.77    1072.48    55      581.30     1042.36   1177.64    46      521.17     615.79    683.05

  1991Q2   181    541.83     925.51    1202.50    67      520.73     845.31    863.39     61      389.77     514.38    591.10

  1991Q3   155    582.74     951.32    1272.48    69      436.10     736.63    758.00     69      357.48     404.81    473.63

  1991Q4   83     523.67     791.58    1006.93    32      371.63     653.21    754.69     40      403.23     434.24    507.81

  1992Q1   125    502.93     824.50    945.20     51      377.85     639.38    623.52     53      346.57     421.39    488.13

  1992Q2   116    422.66     746.09    960.10     39      378.50     659.02    698.70     77      336.32     417.39    470.00

  1992Q3   92     414.86     768.59    943.23     43      402.72     732.02    772.93     72      349.93     395.29    421.19

  1992Q4   131    446.56     636.45    763.88     38      284.51     503.08    506.45     53      288.19     374.23    433.31

  1993Q1   172    413.86     657.32    729.95     67      254.89     497.02    516.29     55      272.51     338.42    405.37

  1993Q2   156    399.73     613.27    756.70     71      159.78     379.04    480.06     58      248.14     315.82    351.35

  1993Q3   173    416.44     607.90    694.68     99      252.88     444.94    490.07     118     241.43     305.08    339.59

  1993Q4   134    383.10     600.43    711.60     61      280.32     473.75    515.20     48      282.75     342.58    425.54

  1994Q1   196    445.89     658.99    710.40     93      221.24     395.57    386.99     67      272.27     331.75    368.74

  1994Q2   173    371.89     583.16    626.25     83      267.44     443.33    451.28     79      267.85     338.38    391.76

  1994Q3   192    406.26     647.89    697.85     84      217.88     419.32    478.93     86      224.13     280.58    305.44

  1994Q4   173    312.27     570.61    665.80     85      237.88     415.17    437.20     68      193.37     245.39    313.44

  1995Q1   197    316.01     547.59    695.70     79      242.42     408.00    426.55     104     182.07     245.76    309.62

  1995Q2   223    394.71     542.00    611.80     92      212.74     359.09    367.96     76      189.35     218.70    268.40

  1995Q3   202    386.54     576.32    708.58     104     204.35     418.08    492.79     102     163.30     236.50    282.45

  1995Q4   187    331.57     512.86    548.73     68      241.18     426.41    457.64     54      226.70     249.97    266.15
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.3**

**Estimated Quarterly Price Per Expected Pure Gram of Heroin**

**Constant 2002 Dollars (Continued)**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
            ≤ 1                                   1-10                                    \>10                         
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1996Q1   214    386.42     515.03    660.30     93      178.05     388.91    424.10     62      240.16     258.08    311.54

  1996Q2   224    330.96     541.10    683.95     111     208.78     384.19    436.81     99      212.44     277.18    343.75

  1996Q3   187    343.96     502.79    599.03     99      202.81     389.20    431.12     93      196.23     237.48    287.63

  1996Q4   197    318.81     503.82    623.65     92      173.27     351.66    396.87     73      187.60     221.19    248.18

  1997Q1   280    321.53     493.94    657.90     90      182.69     328.91    315.58     87      181.03     221.20    247.95

  1997Q2   248    318.27     529.13    644.03     119     192.04     340.70    355.47     106     154.58     189.74    222.75

  1997Q3   218    294.21     486.55    595.05     99      168.32     306.82    363.62     95      187.01     225.09    273.24

  1997Q4   52     290.61     454.54    539.80     41      193.46     333.96    374.91     79      162.62     197.25    241.32

  1998Q1   314    302.07     472.51    576.88     142     128.82     295.89    319.41     99      151.58     203.40    240.57

  1998Q2   210    310.73     431.11    511.80     140     150.06     287.25    287.09     141     153.30     167.67    204.40

  1998Q3   160    322.34     441.91    564.40     124     159.23     289.14    302.26     105     141.03     172.69    205.54

  1998Q4   202    256.40     385.51    411.70     120     141.32     305.41    374.30     100     161.71     199.32    248.45

  1999Q1   265    286.13     415.09    533.18     163     142.86     271.82    290.73     111     162.60     197.94    221.85

  1999Q2   257    291.52     440.17    473.70     158     144.53     281.97    289.14     98      143.75     186.69    230.25

  1999Q3   254    316.70     409.30    496.28     161     130.01     270.59    309.09     112     139.67     165.52    175.80

  1999Q4   194    303.95     441.40    512.75     104     112.97     240.25    293.81     87      126.52     154.05    172.41

  2000Q1   258    323.89     428.43    444.83     131     126.46     259.00    323.44     100     122.60     153.13    192.45

  2000Q2   216    290.34     413.43    510.30     164     127.47     272.67    298.48     117     123.48     145.67    174.96

  2000Q3   222    300.89     405.47    446.55     155     144.79     251.39    253.66     112     138.77     174.43    210.13

  2000Q4   209    306.50     408.26    479.80     86      163.35     295.08    331.85     64      102.28     141.16    171.55

  2001Q1   218    284.15     391.98    440.08     164     141.78     256.02    246.05     84      116.09     152.42    184.84

  2001Q2   219    273.31     407.51    563.70     140     138.93     238.68    269.23     105     93.64      139.39    172.82

  2001Q3   218    265.30     396.78    477.85     118     145.26     260.00    275.99     105     110.42     132.61    162.70

  2001Q4   223    285.42     396.83    453.03     81      128.19     229.36    242.67     60      81.06      114.06    142.91

  2002Q1   228    305.58     392.39    424.23     111     141.58     253.80    275.33     81      118.77     143.57    158.71

  2002Q2   225    285.31     405.35    453.75     149     114.46     229.55    250.27     83      100.10     130.27    157.67

  2002Q3   225    280.38     388.20    494.18     134     142.69     256.93    282.95     114     129.66     148.69    183.67

  2002Q4   79     196.76     302.06    367.50     67      128.85     223.08    221.18     50      111.91     130.74    156.53

  2003Q1   215    261.38     361.76    391.95     110     111.02     227.97    253.51     60      111.98     128.84    142.08

  2003Q2   52     238.51     362.14    403.98     51      157.83     264.13    289.52     43      119.70     149.60    184.44
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004.

# Table A.4

**Estimated Quarterly Price Per Expected Pure Gram of\
d-Methamphetamine, Constant 2002 Dollars**

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1981Q1   19      228.40     327.92    403.14     20       112.81     154.10    192.64                                  

  1981Q2   11      397.84     476.90    596.95     9        117.83     159.53    199.21                                  

  1981Q3   8       262.76     353.51    439.55     10       101.70     139.00    171.95                                  

  1981Q4   8       405.31     446.60    548.72     8        119.01     162.23    201.22                                  

  1982Q1   14      285.86     349.66    427.50     19       162.13     219.48    274.11     8       68.99      91.83     99.07

  1982Q2   16      377.69     492.24    610.78     8        134.77     186.82    234.07                                  

  1982Q3   22      295.64     358.50    442.14     14       156.36     211.77    264.35                                  

  1982Q4   25      287.90     374.09    462.30     16       151.21     182.01    233.95                                  

  1983Q1   29      377.33     533.01    666.04     8        147.02     196.45    248.57                                  

  1983Q2   31      309.31     370.58    462.58     12       202.91     274.34    344.36                                  

  1983Q3   17      272.62     387.56    481.21     14       124.10     187.91    238.26                                  

  1983Q4   25      245.75     295.09    367.51     8        112.37     152.28    189.98     8       80.51      106.51    114.33

  1984Q1   31      273.25     349.14    434.90     8        252.82     347.82    433.78     8       59.28      77.94     85.58

  1984Q2   31      240.64     288.55    359.88     28       153.12     226.14    287.48     12      44.13      59.02     63.38

  1984Q3   19      316.05     398.14    491.22     13       143.45     213.49    269.32     13      44.50      59.52     63.90

  1984Q4   32      294.63     367.94    452.20     19       124.22     183.99    233.22     6       68.37      91.50     98.18

  1985Q1   37      363.82     449.95    487.32     32       144.30     204.20    257.02     12      49.72      65.88     71.40

  1985Q2   11      230.98     318.49    396.43     13       178.23     261.43    328.11                                  

  1985Q3   24      236.34     333.16    417.17     9        89.24      120.03    150.88                                  

  1985Q4   28      319.04     407.77    495.87     16       131.46     176.88    222.27     7       88.59      116.99    127.20

  1986Q1   39      260.20     334.03    417.66     22       155.61     229.14    292.15                                  

  1986Q2   23      208.73     254.12    315.64     15       212.22     276.60    346.77     6       68.20      89.94     97.95

  1986Q3   28      268.48     335.29    417.28     14       202.56     278.42    350.82     6       35.54      48.58     52.41

  1986Q4   24      205.96     248.40    308.01     9        104.27     154.51    195.76     5       32.75      46.58     50.11

  1987Q1   25      232.56     289.88    361.45     18       147.68     198.19    248.84     5       230.53     306.57    330.99

  1987Q2   30      210.78     275.44    345.28     25       143.08     186.71    241.91                                  

  1987Q3   22      168.64     210.13    262.12     12       141.23     188.94    237.18                                  

  1987Q4   43      233.88     304.50    379.74     18       131.13     179.20    225.93                                  

  1988Q1   64      205.70     239.00    297.44     39       109.31     147.51    184.82     9       52.67      74.13     80.59

  1988Q2   60      266.53     324.38    398.60     30       102.16     138.38    176.01     9       54.81      72.58     78.72
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.4**

Estimated Quarterly Price Per Expected Pure Gram of\
d-Methamphetamine, Constant 2002 Dollars (Continued)

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1988Q3   29      206.76     256.34    321.35     36       138.16     186.43    233.60     8       48.30      73.28     80.07

  1988Q4   29      228.02     283.67    354.41     27       111.34     150.17    189.86     8       42.96      60.48     65.72

  1989Q1   35      205.94     257.08    320.09     33       110.90     150.61    191.07     8       56.68      79.77     86.72

  1989Q2   26      207.42     258.19    322.37     20       117.77     159.56    204.54                                  

  1989Q3   23      388.42     468.21    580.88     21       104.12     142.01    179.39                                  

  1989Q4   30      331.24     414.34    514.82     18       144.75     198.35    248.55                                  

  1990Q1   25      204.31     254.31    317.55     25       233.73     284.39    361.71                                  

  1990Q2   16      431.39     531.48    670.49     26       273.02     375.06    474.20     8       169.74     240.64    265.38

  1990Q3   21      277.11     344.33    430.70     28       147.86     202.15    256.81     10      96.61      136.85    149.36

  1990Q4   17      399.84     479.79    597.96     15       193.52     263.61    333.42     8       76.71      101.07    110.16

  1991Q1   32      457.08     580.08    710.42     22       140.15     191.66    241.47     10      78.62      103.46    112.90

  1991Q2   18      363.13     450.15    564.39     29       272.62     361.34    460.92     9       58.44      82.09     89.41

  1991Q3   16      360.04     445.76    559.58     21       179.24     243.99    308.81     8       87.66      123.47    134.13

  1991Q4   9       259.68     323.11    403.60     25       219.50     298.30    376.90     8       116.11     163.78    177.62

  1992Q1   11      195.32     232.44    290.76     31       147.94     185.07    233.78     8       111.94     156.20    171.26

  1992Q2   18      191.50     251.18    317.78     28       140.01     186.97    236.72     13      70.28      92.67     100.91

  1992Q3   22      189.23     233.34    294.11     29       113.02     154.05    195.22     12      42.82      60.06     65.52

  1992Q4   12      184.96     231.04    287.47     28       102.50     139.15    176.61     8       52.72      73.70     80.65

  1993Q1   28      177.75     218.24    276.27     18       129.78     157.48    196.79     7       51.10      71.45     78.17

  1993Q2   21      200.99     249.37    312.38     20       114.23     154.71    196.15                                  

  1993Q3   25      198.26     244.80    308.14     34       90.87      111.59    140.63     16      37.07      51.92     56.72

  1993Q4   39      106.85     149.08    192.95     31       81.16      108.17    137.22     11      36.66      51.29     56.08

  1994Q1   28      140.57     172.44    218.48     34       75.97      103.61    131.94     28      38.07      52.64     57.14

  1994Q2   32      139.42     173.58    216.68     53       73.94      100.06    125.00     22      32.57      45.41     49.83

  1994Q3   32      97.33      119.66    151.28     57       63.04      86.14     107.06     20      32.51      45.90     49.74

  1994Q4   38      153.38     175.73    217.07     41       62.24      84.52     106.87     23      33.86      47.36     51.80

  1995Q1   51      137.78     170.40    214.14     70       80.27      109.63    135.72     26      31.73      41.41     45.56

  1995Q2   40      147.39     180.62    229.08     102      66.86      91.91     115.19     42      27.05      39.24     42.97

  1995Q3   67      143.02     178.33    222.29     56       81.09      109.91    136.64     24      47.91      67.19     73.29

  1995Q4   55      401.72     487.72    600.76     33       199.09     272.63    345.79     17      149.63     197.43    219.59
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.4**

Estimated Quarterly Price Per Expected Pure Gram of\
d-Methamphetamine, Constant 2002 Dollars (Continued)

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1996Q1   27      194.01     238.95    301.54     56       139.79     193.01    240.85     16      78.53      109.45    120.15

  1996Q2   42      170.68     213.23    265.28     53       102.42     138.13    172.59     32      50.01      69.62     76.50

  1996Q3   24      243.49     299.97    380.08     40       99.82      139.27    172.83     46      50.07      69.80     75.75

  1996Q4   35      138.37     171.02    215.06     77       80.11      109.64    139.14     50      51.08      71.04     77.12

  1997Q1   47      158.36     195.42    246.12     99       74.15      101.66    128.80     43      32.21      46.08     49.87

  1997Q2   48      117.12     149.59    193.26     114      80.72      110.33    140.21     57      45.39      59.37     65.19

  1997Q3   60      125.70     155.80    195.38     133      79.45      109.30    137.99     51      36.91      53.32     58.26

  1997Q4   72      171.99     212.24    267.32     143      88.04      121.48    151.68     66      47.10      61.42     67.63

  1998Q1   77      167.38     209.90    260.15     154      94.25      129.45    166.80     79      49.71      69.64     73.63

  1998Q2   72      192.89     246.63    299.80     150      170.34     232.88    287.61     66      98.50      129.12    142.62

  1998Q3   61      257.86     319.52    415.64     132      179.43     250.86    311.65     85      114.69     160.34    178.69

  1998Q4   41      205.23     248.05    320.09     145      141.28     187.57    242.59     94      89.82      119.32    130.08

  1999Q1   61      204.85     254.13    318.13     115      167.18     228.07    288.04     92      77.92      109.37    119.62

  1999Q2   59      163.31     200.63    249.79     102      125.68     173.98    216.53     91      60.72      81.38     89.70

  1999Q3   75      162.52     203.54    252.59     165      105.58     142.58    181.91     119     57.50      80.15     89.90

  1999Q4   63      144.33     184.08    242.45     122      118.00     164.25    203.31     99      52.33      76.74     84.94

  2000Q1   69      105.06     148.31    185.45     130      96.89      133.22    168.29     130     53.25      73.22     79.13

  2000Q2   79      163.85     208.98    263.52     167      113.12     156.77    196.47     106     58.56      79.63     86.88

  2000Q3   51      156.14     186.41    240.18     139      98.42      142.78    182.71     122     47.61      71.95     76.68

  2000Q4   44      142.27     175.77    233.66     96       98.67      132.09    180.14     100     46.76      68.00     73.57

  2001Q1   74      140.83     175.86    218.89     124      84.60      120.64    146.93     110     53.69      70.95     78.46

  2001Q2   63      150.39     187.95    248.15     151      88.22      119.16    141.29     139     41.10      61.96     70.34

  2001Q3   77      147.86     182.60    239.62     145      71.34      99.41     134.99     157     42.41      58.10     63.21

  2001Q4   68      144.89     180.46    225.20     128      86.13      114.77    139.36     86      44.15      67.02     73.68

  2002Q1   74      140.27     180.01    230.09     142      74.45      100.34    127.84     111     41.47      60.54     65.91

  2002Q2   88      118.79     150.53    191.04     153      76.58      105.49    133.02     104     39.41      57.54     63.11

  2002Q3   58      125.02     157.57    201.06     144      79.23      105.21    134.64     111     45.69      66.17     71.72

  2002Q4   55      99.87      126.96    164.80     97       78.13      105.04    137.44     79      32.78      49.30     53.23

  2003Q1   82      115.71     143.43    181.81     179      66.25      90.94     114.15     89      33.67      46.31     50.26

  2003Q2   39      134.34     167.79    207.88     104      67.75      90.60     114.39     54      38.21      50.26     54.26
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004.

**Table A.5**

**Estimated Quarterly Price Per Gram of Marijuana, Constant 2002
Dollars**

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1981Q1   16      5.07       6.40      7.37       24       3.73       3.79      3.95       3       1.32       1.72      2.05

  1981Q2   35      5.03       6.36      7.32       7        3.28       3.36      3.51       2       1.21       1.57      1.88

  1981Q3   41      4.83       6.10      7.02       13       3.23       3.31      3.46       11      1.27       1.65      1.97

  1981Q4   38      5.15       6.51      7.49       12       3.17       3.21      3.35       1       1.34       1.74      2.08

  1982Q1   10      5.56       7.04      8.09       11       5.27       5.34      5.66       6       1.38       1.84      2.15

  1982Q2   17      5.53       6.99      8.04       12       4.68       4.74      5.03       3       1.27       1.68      1.97

  1982Q3   8       5.30       6.71      7.71       9        4.61       4.67      4.95       8       1.33       1.76      2.06

  1982Q4   10      5.65       7.15      8.22       4        4.48       4.53      4.80       13      1.40       1.86      2.18

  1983Q1   10      9.86       12.48     14.35      10       7.62       8.40      8.43       2       2.51       3.45      4.58

  1983Q2   27      9.80       12.39     14.25      9        6.77       7.46      7.50       6       2.24       3.16      4.20

  1983Q3   18      9.40       11.89     13.67      8        6.51       7.35      7.38       8       2.34       3.31      4.40

  1983Q4   11      10.02      12.68     14.58      18       6.32       7.13      7.16       18      2.55       3.50      4.65

  1984Q1   18      9.29       11.76     13.52      9        4.41       4.78      5.17       5       2.49       3.42      3.56

  1984Q2   35      9.23       11.68     13.43      10       3.92       4.25      4.59       9       2.28       3.13      3.14

  1984Q3   18      8.86       11.20     12.88      9        3.86       4.19      4.52       7       2.38       3.28      3.29

  1984Q4   16      9.44       11.94     13.73      13       3.75       4.06      4.39       7       2.48       3.47      3.48

  1985Q1   28      10.17      12.87     14.79      12       5.99       6.55      6.95       13      2.31       3.04      3.63

  1985Q2   22      10.10      12.78     14.69      9        5.32       5.82      6.18       18      2.11       2.78      3.47

  1985Q3   16      9.69       12.26     14.09      5        5.24       5.73      6.08       6       2.21       2.91      3.59

  1985Q4   9       10.33      13.07     15.03      6        5.09       5.56      5.90       9       2.34       3.08      3.79

  1986Q1   8       11.97      15.15     17.41      5        10.31      10.45     10.91      6       2.77       3.51      4.36

  1986Q2   10      11.89      15.05     17.30      2        9.05       9.28      9.69       3       2.54       3.22      3.99

  1986Q3   12      11.41      14.44     16.59      2        9.02       9.14      9.55       3       2.66       3.37      4.18

  1986Q4   17      12.16      15.39     17.69      4        8.75       8.87      9.26       5       2.81       3.56      4.42

  1987Q1   29      11.06      14.00     16.09      5        7.44       7.60      7.88       11      4.27       5.19      6.22

  1987Q2   19      10.99      13.91     15.98      4        6.61       6.75      7.00       26      3.91       4.75      5.69

  1987Q3   9       10.54      13.34     15.33      5        6.51       6.65      6.89       9       4.09       4.98      5.97

  1987Q4   4       11.24      14.22     16.34      6        6.32       6.45      6.68       3       4.33       5.26      6.30

  1988Q1   15      11.61      14.70     16.89      3        8.29       8.57      8.75       10      2.60       3.52      4.27

  1988Q2   12      11.54      14.60     16.78      10       7.37       7.61      7.78       3       2.41       3.22      4.03
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.5**

**Estimated Quarterly Price Per Gram of Marijuana**

**Constant 2002 Dollars (Continued)**

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1988Q3   10      11.07      14.01     16.10      3        7.25       7.49      7.66       2       2.50       3.38      4.10

  1988Q4   6       11.80      14.94     17.16      9        7.03       7.27      7.43       8       2.64       3.57      4.33

  1989Q1   8       11.00      13.93     16.00      5        8.59       8.77      9.23       16      3.00       3.89      4.71

  1989Q2   6       10.93      13.84     15.89      6        7.63       7.79      8.20       6       2.75       3.57      4.31

  1989Q3   10      10.48      13.28     15.25      4        7.52       7.67      8.07       8       2.88       3.74      4.52

  1989Q4   10      11.18      14.15     16.26      2        7.29       7.44      7.83       2       3.04       3.95      4.73

  1990Q1   8       11.94      15.11     17.36      9        10.65      10.97     11.42      17      3.29       4.38      5.57

  1990Q2   10      11.86      15.01     17.24      4        9.46       9.74      10.15      11      3.02       4.01      4.97

  1990Q3   8       11.38      14.40     16.55      1        9.32       9.59      9.99       4       3.16       4.20      5.35

  1990Q4   14      12.13      15.35     17.64      12       9.04       9.31      9.69       23      3.34       4.44      5.50

  1991Q1   14      14.05      17.79     20.44      30       10.90      11.76     11.69      32      3.97       4.99      6.18

  1991Q2   16      13.96      17.67     20.30      8        9.68       10.45     10.39      11      3.63       4.57      5.66

  1991Q3   5       13.39      16.96     19.48      5        9.53       10.29     10.23      5       3.81       4.79      5.93

  1991Q4   4       14.27      18.08     20.76               9.25       9.98      9.93       31      4.02       5.06      6.03

  1992Q1   12      12.07      15.29     17.55      7        7.66       7.97      8.31       20      3.21       4.43      5.78

  1992Q2   18      11.99      15.19     17.44      12       6.81       7.08      7.25       23      3.07       4.05      5.00

  1992Q3   25      11.50      14.57     16.73      7        6.70       6.97      7.27       35      3.08       4.25      5.55

  1992Q4   14      12.26      15.54     17.83      8        6.50       6.77      7.05       26      3.39       4.49      5.86

  1993Q1   23      11.61      14.72     16.89      4        11.21      11.98     12.39      14      3.34       4.76      6.01

  1993Q2   27      11.53      14.62     16.77      8        9.96       10.65     10.97      13      3.06       4.36      5.50

  1993Q3   37      11.06      14.03     16.09      13       9.93       10.48     10.84      14      3.20       4.57      5.76

  1993Q4   27      11.80      14.96     17.16      9        9.52       10.17     10.51      13      3.31       4.83      6.09

  1994Q1   12      10.38      13.17     15.10      6        11.23      12.14     11.97      18      2.72       3.68      4.65

  1994Q2   21      10.31      13.09     15.00      3        9.98       10.78     10.63      26      2.49       3.37      4.26

  1994Q3   9       9.90       12.56     14.39      6        9.83       10.62     10.47      15      2.61       3.54      4.46

  1994Q4   15      10.55      13.39     15.35      22       9.53       10.30     10.16      13      2.76       3.73      4.71

  1995Q1   14      9.32       11.83     13.55      17       7.25       8.10      7.82       21      2.71       3.47      4.41

  1995Q2   9       9.25       11.75     13.46      8        6.52       7.19      6.95       37      2.55       3.18      4.06

  1995Q3   13      8.88       11.27     12.92      4        6.42       7.08      6.84       20      2.68       3.33      4.26

  1995Q4   43      9.47       12.02     13.77      18       6.23       6.87      6.64       18      2.83       3.52      4.50
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.5**

**Estimated Quarterly Price Per Gram of Marijuana**

**Constant 2002 Dollars (Continued)**

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1996Q1   23      7.94       10.08     11.54      16       5.26       6.98      7.37       23      2.11       2.66      3.00

  1996Q2   22      7.88       10.01     11.47      11       4.67       6.20      6.55       23      1.94       2.44      2.75

  1996Q3   15      7.56       9.61      11.00      13       4.60       6.10      6.45       27      2.03       2.55      2.88

  1996Q4   12      8.06       10.24     11.73      6        4.46       5.92      6.25       13      2.14       2.70      3.04

  1997Q1   44      7.34       9.34      10.68      16       4.79       5.06      5.07       28      2.24       2.83      3.69

  1997Q2   40      7.29       9.27      10.61      28       4.25       4.49      4.51       33      2.05       2.59      3.38

  1997Q3   26      7.00       8.90      10.18      16       4.19       4.42      4.44       35      2.15       2.72      3.54

  1997Q4   20      7.46       9.48      10.85      7        4.06       4.29      4.30       19      2.27       2.87      3.74

  1998Q1   10      6.88       8.76      10.01      13       6.43       6.57      6.81       27      2.37       3.15      3.85

  1998Q2   34      6.84       8.70      9.95       12       5.71       5.83      6.05       35      2.17       2.89      3.53

  1998Q3   24      6.56       8.35      9.54       6        5.62       5.75      5.95       27      2.28       3.03      3.69

  1998Q4   25      6.99       8.90      10.17      10       5.46       5.57      5.78       18      2.44       3.20      3.90

  1999Q1   31      7.69       9.79      11.19      7        8.28       9.39      8.89       23      2.19       2.94      3.70

  1999Q2   61      7.64       9.73      11.12      11       7.35       8.34      7.90       29      2.01       2.70      3.39

  1999Q3   97      7.33       9.33      10.67      11       6.73       8.21      7.78       26      2.10       2.82      3.55

  1999Q4   22      7.82       9.95      11.37      11       6.53       7.97      7.54       22      2.22       2.98      3.75

  2000Q1   32      6.95       8.85      10.11      11       5.30       5.78      5.78       33      1.89       2.61      3.06

  2000Q2   24      6.90       8.79      10.04      3        4.70       5.13      5.13       27      1.78       2.39      2.80

  2000Q3   11      6.62       8.44      9.64       6        4.57       5.05      5.05       26      1.87       2.50      2.93

  2000Q4   39      7.06       8.99      10.27      10       4.49       4.90      4.90       16      1.97       2.64      3.10

  2001Q1   29      7.59       9.67      11.04      14       5.09       5.76      5.96       31      1.83       2.54      3.15

  2001Q2   39      7.54       9.61      10.97      4        4.52       5.11      5.29       9       1.68       2.32      2.86

  2001Q3   49      7.23       9.22      10.52      9        4.45       5.04      5.21       20      1.76       2.44      3.00

  2001Q4   76      7.71       9.83      11.22      11       4.32       4.89      5.06       12      1.86       2.57      3.19

  2002Q1   55      8.78       11.19     12.77      12       8.47       9.66      9.64       16      2.16       3.49      3.51

  2002Q2   60      8.72       11.12     12.68      8        7.62       8.58      8.56       24      1.98       3.20      3.21

  2002Q3   51      8.36       10.67     12.17      3        7.41       8.45      8.43       11      2.07       3.35      3.37

  2002Q4   79      8.92       11.37     12.97      3        7.19       8.20      8.18       19      2.19       3.54      3.55

  2003Q1   66      8.94       11.41     13.00      13       6.64       7.55      7.14       26      1.99       2.57      3.13

  2003Q2   10      8.88       11.33     12.91      8        5.90       6.70      6.34       18      1.82       2.36      2.86
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004.

Table A.6: Estimated Purity Per Gram of Powder Cocaine, Quarterly Series

  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------
           ≤ 2                                            2-10 Grams                             10-50                                  \> 50                
           Grams                                                                                 Grams                                  Grams                

           Num.    1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile

  1981Q1   56      0.31       0.32      0.36       86     0.43       0.48      0.53       127    0.45       0.47      0.50       25     0.52       0.56      0.61

  1981Q2   53      0.34       0.39      0.42       67     0.36       0.41      0.46       113    0.44       0.50      0.55       13     0.57       0.60      0.64

  1981Q3   48      0.43       0.48      0.54       53     0.36       0.42      0.47       113    0.47       0.51      0.56                                    

  1981Q4   52      0.34       0.41      0.46       52     0.37       0.43      0.48       53     0.45       0.51      0.59       6      0.47       0.51      0.54

  1982Q1   87      0.34       0.38      0.42       86     0.32       0.37      0.41       138    0.45       0.49      0.53       15     0.53       0.57      0.61

  1982Q2   64      0.36       0.42      0.46       96     0.41       0.46      0.50       92     0.40       0.46      0.49       21     0.56       0.62      0.65

  1982Q3   95      0.42       0.47      0.55       116    0.38       0.44      0.50       150    0.45       0.50      0.54       19     0.48       0.51      0.54

  1982Q4   86      0.38       0.45      0.50       72     0.44       0.51      0.56       107    0.46       0.50      0.55       8      0.66       0.70      0.74

  1983Q1   111     0.40       0.45      0.48       112    0.40       0.48      0.51       151    0.54       0.59      0.65       30     0.61       0.66      0.69

  1983Q2   56      0.47       0.51      0.54       133    0.45       0.48      0.52       184    0.51       0.55      0.60       38     0.68       0.72      0.76

  1983Q3   61      0.43       0.47      0.53       100    0.41       0.47      0.51       169    0.58       0.62      0.67       45     0.71       0.75      0.79

  1983Q4   116     0.43       0.51      0.60       147    0.49       0.54      0.59       217    0.61       0.67      0.74       46     0.74       0.78      0.81

  1984Q1   129     0.45       0.52      0.58       128    0.47       0.54      0.59       227    0.64       0.69      0.72       60     0.72       0.76      0.80

  1984Q2   98      0.49       0.55      0.64       131    0.52       0.59      0.64       230    0.65       0.69      0.75       64     0.70       0.74      0.79

  1984Q3   81      0.48       0.53      0.58       125    0.50       0.55      0.59       246    0.60       0.66      0.72       61     0.66       0.70      0.73

  1984Q4   106     0.47       0.53      0.59       146    0.48       0.54      0.60       282    0.60       0.65      0.70       60     0.68       0.72      0.78

  1985Q1   129     0.42       0.50      0.55       183    0.49       0.57      0.61       295    0.56       0.62      0.67       71     0.68       0.73      0.76

  1985Q2   172     0.42       0.53      0.58       163    0.48       0.53      0.57       332    0.47       0.57      0.67       94     0.56       0.60      0.65

  1985Q3   162     0.43       0.49      0.54       170    0.48       0.54      0.59       384    0.59       0.63      0.70       87     0.62       0.67      0.73

  1985Q4   145     0.48       0.53      0.57       145    0.52       0.60      0.66       390    0.61       0.68      0.72       110    0.65       0.77      0.76

  1986Q1   161     0.47       0.57      0.65       168    0.57       0.62      0.69       400    0.68       0.73      0.77       113    0.72       0.78      0.84

  1986Q2   170     0.54       0.56      0.66       184    0.63       0.68      0.72       369    0.69       0.75      0.80       112    0.70       0.78      0.83

  1986Q3   142     0.57       0.54      0.67       150    0.69       0.73      0.77       335    0.69       0.76      0.81       102    0.78       0.81      0.86

  1986Q4   135     0.66       0.55      0.75       128    0.70       0.72      0.76       346    0.71       0.78      0.85       124    0.81       0.86      0.89

  1987Q1   150     0.67       0.66      0.78       88     0.72       0.76      0.80       291    0.75       0.80      0.85       136    0.80       0.85      0.88

  1987Q2   96      0.71       0.71      0.78       121    0.74       0.79      0.84       411    0.76       0.79      0.85       200    0.76       0.79      0.83

  1987Q3   95      0.71       0.73      0.77       121    0.72       0.77      0.82       440    0.77       0.81      0.85       214    0.80       0.83      0.88

  1987Q4   94      0.67       0.71      0.75       113    0.77       0.80      0.84       369    0.79       0.84      0.87       182    0.83       0.86      0.87

  1988Q1   88      0.72       0.76      0.80       136    0.72       0.77      0.81       397    0.81       0.84      0.88       171    0.80       0.83      0.86

  1988Q2   121     0.63       0.67      0.70       115    0.68       0.74      0.80       362    0.74       0.78      0.82       181    0.78       0.81      0.84
  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------

**Table A.6: Estimated Purity Per Gram of Powder Cocaine, Quarterly
Series (Continued)**

  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------
           ≤ 2                                            2-10 Grams                             10-50                                  \> 50                
           Grams                                                                                 Grams                                  Grams                

           Num.    1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile

  1988Q3   111     0.69       0.73      0.79       127    0.76       0.79      0.84       353    0.74       0.78      0.83       255    0.80       0.82      0.86

  1988Q4   87      0.74       0.77      0.81       112    0.76       0.80      0.83       348    0.79       0.82      0.86       239    0.77       0.82      0.88

  1989Q1   84      0.71       0.74      0.78       144    0.71       0.75      0.80       387    0.78       0.80      0.84       247    0.78       0.81      0.84

  1989Q2   81      0.69       0.74      0.77       89     0.74       0.79      0.83       374    0.71       0.74      0.80       206    0.76       0.78      0.83

  1989Q3   84      0.63       0.66      0.73       92     0.67       0.72      0.75       309    0.69       0.74      0.79       265    0.75       0.77      0.81

  1989Q4   81      0.56       0.60      0.65       102    0.63       0.67      0.71       250    0.65       0.69      0.73       185    0.70       0.72      0.77

  1990Q1   96      0.57       0.62      0.65       111    0.56       0.61      0.64       231    0.60       0.66      0.70       180    0.62       0.67      0.74

  1990Q2   49      0.51       0.59      0.69       66     0.45       0.50      0.55       196    0.56       0.60      0.65       142    0.58       0.63      0.68

  1990Q3   74      0.45       0.52      0.56       82     0.53       0.58      0.62       240    0.54       0.60      0.68       184    0.60       0.62      0.66

  1990Q4   70      0.56       0.59      0.63       73     0.56       0.61      0.65       263    0.60       0.67      0.72       161    0.68       0.71      0.74

  1991Q1   145     0.53       0.61      0.65       126    0.58       0.62      0.68       342    0.65       0.71      0.76       238    0.68       0.73      0.78

  1991Q2   66      0.58       0.61      0.66       87     0.66       0.70      0.79       311    0.67       0.73      0.80       309    0.71       0.75      0.80

  1991Q3   49      0.62       0.67      0.71       101    0.61       0.68      0.73       325    0.71       0.76      0.82       298    0.74       0.77      0.81

  1991Q4   49      0.57       0.64      0.69       78     0.69       0.76      0.81       276    0.75       0.78      0.82       241    0.77       0.80      0.83

  1992Q1   70      0.61       0.68      0.73       90     0.61       0.67      0.74       295    0.71       0.76      0.79       241    0.77       0.79      0.83

  1992Q2   47      0.59       0.63      0.69       66     0.62       0.65      0.68       193    0.62       0.67      0.72       156    0.68       0.71      0.78

  1992Q3   68      0.64       0.68      0.73       61     0.62       0.66      0.70       229    0.69       0.73      0.79       224    0.67       0.73      0.80

  1992Q4   45      0.67       0.71      0.74       46     0.65       0.70      0.74       165    0.72       0.76      0.80       103    0.77       0.79      0.83

  1993Q1   43      0.65       0.68      0.72       48     0.58       0.65      0.70       100    0.63       0.68      0.72       78     0.72       0.76      0.80

  1993Q2   44      0.66       0.69      0.70       57     0.69       0.73      0.78       148    0.63       0.67      0.72       71     0.67       0.71      0.75

  1993Q3   52      0.64       0.69      0.71       54     0.59       0.65      0.70       147    0.64       0.68      0.71       97     0.71       0.74      0.78

  1993Q4   46      0.65       0.68      0.71       52     0.59       0.64      0.69       113    0.64       0.67      0.69       84     0.70       0.74      0.77

  1994Q1   51      0.65       0.70      0.74       56     0.67       0.72      0.77       143    0.66       0.71      0.75       96     0.71       0.74      0.79

  1994Q2   30      0.61       0.63      0.67       54     0.64       0.68      0.72       156    0.69       0.74      0.78       101    0.75       0.78      0.83

  1994Q3   61      0.61       0.63      0.66       53     0.63       0.68      0.72       171    0.67       0.71      0.76       150    0.72       0.77      0.81

  1994Q4   29      0.66       0.68      0.72       47     0.58       0.61      0.66       141    0.70       0.74      0.77       109    0.74       0.78      0.81

  1995Q1   32      0.68       0.70      0.75       69     0.71       0.75      0.79       145    0.73       0.76      0.80       102    0.69       0.73      0.77

  1995Q2   25      0.48       0.52      0.56       45     0.62       0.68      0.72       112    0.66       0.71      0.76       112    0.66       0.71      0.76

  1995Q3   33      0.56       0.61      0.66       57     0.57       0.62      0.68       107    0.57       0.60      0.65       108    0.62       0.65      0.68

  1995Q4   48      0.57       0.60      0.63       38     0.58       0.62      0.67       118    0.61       0.65      0.68       102    0.62       0.66      0.70
  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------

Table A.6: Estimated Purity Per Gram of Powder Cocaine, Quarterly Series
(Continued)

  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------
           ≤ 2                                            2-10 Grams                             10-50                                  \> 50                
           Grams                                                                                 Grams                                  Grams                

           Num.    1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^      Num.   1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile   Obs.   Quartile   Average   Quartile

  1996Q1   29      0.66       0.68      0.72       53     0.66       0.70      0.75       124    0.64       0.68      0.72       114    0.69       0.73      0.78

  1996Q2   45      0.67       0.69      0.73       55     0.60       0.64      0.69       143    0.61       0.67      0.73       173    0.67       0.71      0.76

  1996Q3   31      0.66       0.70      0.74       59     0.63       0.69      0.75       164    0.65       0.70      0.74       193    0.69       0.73      0.77

  1996Q4   24      0.81       0.84      0.86       46     0.70       0.73      0.78       155    0.72       0.77      0.81       151    0.70       0.74      0.79

  1997Q1   29      0.64       0.69      0.74       79     0.64       0.69      0.73       149    0.68       0.73      0.79       117    0.69       0.72      0.77

  1997Q2   55      0.55       0.59      0.64       74     0.64       0.68      0.72       99     0.58       0.63      0.67       90     0.60       0.64      0.69

  1997Q3   50      0.60       0.65      0.71       80     0.65       0.71      0.76       160    0.61       0.66      0.71       172    0.60       0.67      0.75

  1997Q4   40      0.65       0.69      0.72       63     0.67       0.71      0.76       158    0.71       0.74      0.77       164    0.65       0.70      0.73

  1998Q1   34      0.72       0.75      0.78       57     0.67       0.71      0.76       178    0.65       0.68      0.75       149    0.65       0.69      0.72

  1998Q2   34      0.64       0.67      0.73       71     0.68       0.73      0.76       169    0.68       0.72      0.77       195    0.70       0.74      0.78

  1998Q3   52      0.60       0.63      0.66       75     0.62       0.67      0.72       199    0.69       0.71      0.75       181    0.68       0.72      0.76

  1998Q4   38      0.67       0.69      0.71       56     0.66       0.70      0.73       157    0.64       0.67      0.70       164    0.65       0.68      0.72

  1999Q1   81      0.59       0.62      0.65       92     0.59       0.63      0.68       141    0.59       0.65      0.71       107    0.55       0.60      0.64

  1999Q2   34      0.58       0.61      0.64       71     0.60       0.65      0.71       134    0.60       0.63      0.69       168    0.59       0.63      0.67

  1999Q3   61      0.63       0.67      0.70       57     0.58       0.63      0.67       193    0.57       0.63      0.69       239    0.61       0.66      0.72

  1999Q4   36      0.67       0.70      0.72       67     0.59       0.64      0.69       148    0.61       0.64      0.70       127    0.60       0.64      0.70

  2000Q1   51      0.57       0.63      0.67       74     0.51       0.56      0.60       137    0.56       0.60      0.64       117    0.50       0.55      0.59

  2000Q2   32      0.58       0.62      0.65       58     0.54       0.58      0.64       156    0.48       0.53      0.57       178    0.45       0.50      0.55

  2000Q3   29      0.55       0.58      0.64       65     0.54       0.59      0.64       181    0.56       0.61      0.66       172    0.56       0.60      0.65

  2000Q4   40      0.57       0.62      0.65       65     0.50       0.55      0.60       171    0.52       0.58      0.62       119    0.55       0.60      0.64

  2001Q1   41      0.57       0.60      0.65       85     0.55       0.60      0.65       192    0.50       0.53      0.57       186    0.53       0.57      0.62

  2001Q2   21      0.53       0.55      0.58       64     0.57       0.62      0.66       169    0.51       0.54      0.58       188    0.51       0.56      0.61

  2001Q3   15      0.61       0.64      0.66       37     0.53       0.57      0.62       131    0.50       0.55      0.59       178    0.49       0.52      0.58

  2001Q4   17      0.49       0.52      0.55       38     0.56       0.59      0.65       98     0.48       0.52      0.55       126    0.47       0.51      0.55

  2002Q1   17      0.62       0.65      0.70       59     0.62       0.66      0.71       119    0.50       0.54      0.58       157    0.53       0.57      0.61

  2002Q2   21      0.68       0.71      0.75       63     0.58       0.63      0.69       109    0.55       0.59      0.65       201    0.53       0.58      0.63

  2002Q3   21      0.72       0.75      0.78       45     0.60       0.65      0.71       149    0.60       0.65      0.69       215    0.55       0.60      0.66

  2002Q4   27      0.65       0.67      0.69       44     0.64       0.68      0.73       120    0.56       0.61      0.65       136    0.57       0.60      0.64

  2003Q1   29      0.66       0.71      0.74       75     0.64       0.69      0.74       175    0.59       0.63      0.67       138    0.57       0.62      0.67

  2003Q2   13      0.66       0.69      0.72       20     0.60       0.65      0.69       108    0.57       0.61      0.66       91     0.60       0.64      0.70
  -------- ------- ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ---------- ------ ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004

######## Table A.7

**Estimated Purity of One Gram of Crack Cocaine, Quarterly Series**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 1                                    1-15                                    \> 15                        
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1986Q1   24     0.87       0.88      0.91       8       0.75       0.76      0.78       6       0.72       0.73      0.75

  1986Q2   45     0.85       0.86      0.88       23      0.75       0.76      0.80       6       0.71       0.74      0.76

  1986Q3   50     0.79       0.78      0.84       21      0.76       0.79      0.80       9       0.74       0.75      0.76

  1986Q4   25     0.85       0.86      0.89       14      0.74       0.75      0.77       10      0.79       0.80      0.83

  1987Q1   42     0.75       0.77      0.80       16      0.75       0.79      0.81       18      0.70       0.72      0.75

  1987Q2   68     0.74       0.76      0.79       35      0.75       0.77      0.79       39      0.61       0.64      0.67

  1987Q3   103    0.89       0.91      0.93       100     0.77       0.78      0.80       17      0.63       0.65      0.68

  1987Q4   122    0.89       0.90      0.93       26      0.86       0.87      0.90       24      0.68       0.70      0.75

  1988Q1   116    0.87       0.88      0.92       42      0.82       0.83      0.85       21      0.67       0.69      0.72

  1988Q2   172    0.77       0.80      0.83       51      0.82       0.84      0.86       35      0.75       0.77      0.79

  1988Q3   228    0.86       0.86      0.89       83      0.81       0.83      0.85       70      0.79       0.81      0.82

  1988Q4   253    0.90       0.90      0.94       71      0.85       0.86      0.88       52      0.81       0.84      0.86

  1989Q1   285    0.86       0.87      0.89       79      0.82       0.85      0.86       72      0.71       0.74      0.77

  1989Q2   399    0.85       0.86      0.89       104     0.82       0.84      0.86       85      0.76       0.79      0.81

  1989Q3   313    0.85       0.86      0.89       120     0.80       0.81      0.82       108     0.72       0.76      0.79

  1989Q4   216    0.86       0.87      0.90       59      0.80       0.82      0.84       54      0.70       0.72      0.73

  1990Q1   298    0.78       0.79      0.83       88      0.78       0.79      0.81       85      0.57       0.61      0.63

  1990Q2   213    0.79       0.79      0.83       88      0.73       0.74      0.77       65      0.51       0.54      0.57

  1990Q3   349    0.76       0.79      0.81       119     0.76       0.76      0.81       101     0.59       0.61      0.64

  1990Q4   240    0.84       0.85      0.89       130     0.84       0.85      0.87       78      0.70       0.73      0.77

  1991Q1   339    0.86       0.87      0.89       171     0.82       0.83      0.85       148     0.76       0.77      0.78

  1991Q2   339    0.82       0.84      0.86       166     0.81       0.83      0.85       198     0.77       0.78      0.80

  1991Q3   312    0.84       0.85      0.89       121     0.82       0.83      0.85       186     0.72       0.74      0.76

  1991Q4   269    0.85       0.86      0.90       150     0.82       0.84      0.87       150     0.77       0.78      0.79

  1992Q1   233    0.81       0.83      0.85       228     0.82       0.85      0.87       190     0.77       0.79      0.81

  1992Q2   207    0.77       0.78      0.80       154     0.78       0.79      0.81       136     0.69       0.72      0.77

  1992Q3   221    0.81       0.84      0.85       256     0.75       0.77      0.79       210     0.74       0.75      0.78

  1992Q4   178    0.83       0.84      0.87       177     0.81       0.83      0.87       168     0.74       0.76      0.80

  1993Q1   147    0.78       0.81      0.84       164     0.77       0.80      0.82       134     0.67       0.70      0.73

  1993Q2   135    0.81       0.83      0.86       202     0.76       0.79      0.81       164     0.66       0.68      0.71

  1993Q3   108    0.76       0.79      0.83       183     0.76       0.79      0.81       171     0.69       0.72      0.75

  1993Q4   125    0.80       0.83      0.85       191     0.78       0.80      0.82       139     0.66       0.71      0.74

  1994Q1   108    0.80       0.82      0.85       226     0.80       0.80      0.84       190     0.71       0.73      0.75

  1994Q2   122    0.78       0.80      0.83       257     0.76       0.78      0.81       185     0.70       0.72      0.74

  1994Q3   142    0.82       0.79      0.84       346     0.77       0.79      0.81       270     0.68       0.71      0.74

  1994Q4   84     0.82       0.84      0.87       311     0.78       0.80      0.83       274     0.70       0.72      0.73
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

######## Table A.7

**Estimated Purity of One Gram of Crack Cocaine, Quarterly Series
(Continued)**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 1                                    1-15                                    \> 15                        
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1995Q1   92     0.80       0.81      0.84       385     0.77       0.78      0.80       300     0.68       0.71      0.73

  1995Q2   124    0.75       0.75      0.79       241     0.75       0.74      0.77       208     0.65       0.66      0.69

  1995Q3   201    0.70       0.72      0.74       217     0.65       0.69      0.71       196     0.57       0.61      0.66

  1995Q4   105    0.73       0.75      0.77       208     0.72       0.74      0.77       191     0.61       0.65      0.70

  1996Q1   102    0.76       0.78      0.80       301     0.74       0.76      0.78       263     0.63       0.65      0.69

  1996Q2   143    0.71       0.72      0.74       313     0.70       0.72      0.76       320     0.63       0.66      0.70

  1996Q3   133    0.74       0.76      0.78       307     0.70       0.73      0.77       317     0.62       0.65      0.70

  1996Q4   187    0.77       0.79      0.81       362     0.74       0.75      0.77       271     0.64       0.66      0.68

  1997Q1   191    0.76       0.78      0.80       354     0.71       0.74      0.78       341     0.61       0.63      0.66

  1997Q2   192    0.63       0.65      0.67       326     0.62       0.63      0.67       258     0.53       0.55      0.59

  1997Q3   183    0.73       0.76      0.78       318     0.67       0.70      0.73       398     0.55       0.59      0.61

  1997Q4   101    0.72       0.73      0.76       275     0.73       0.74      0.77       335     0.61       0.64      0.68

  1998Q1   98     0.74       0.76      0.77       350     0.72       0.74      0.77       405     0.60       0.63      0.67

  1998Q2   156    0.75       0.76      0.79       328     0.70       0.74      0.77       412     0.61       0.63      0.67

  1998Q3   150    0.76       0.79      0.80       345     0.68       0.71      0.75       367     0.58       0.60      0.63

  1998Q4   184    0.69       0.70      0.73       342     0.70       0.71      0.73       312     0.56       0.60      0.64

  1999Q1   227    0.67       0.70      0.72       352     0.64       0.66      0.70       247     0.51       0.53      0.56

  1999Q2   224    0.70       0.71      0.73       368     0.64       0.66      0.69       333     0.55       0.58      0.62

  1999Q3   334    0.70       0.73      0.75       424     0.65       0.67      0.71       393     0.56       0.58      0.61

  1999Q4   300    0.71       0.73      0.76       451     0.63       0.67      0.70       292     0.54       0.57      0.61

  2000Q1   285    0.68       0.69      0.73       501     0.60       0.63      0.66       299     0.48       0.51      0.56

  2000Q2   236    0.64       0.66      0.68       475     0.55       0.59      0.62       400     0.46       0.49      0.52

  2000Q3   171    0.66       0.69      0.71       455     0.58       0.60      0.64       476     0.50       0.52      0.54

  2000Q4   229    0.66       0.68      0.70       388     0.62       0.64      0.68       331     0.52       0.55      0.58

  2001Q1   225    0.67       0.69      0.70       532     0.61       0.64      0.65       426     0.48       0.51      0.55

  2001Q2   252    0.63       0.66      0.67       420     0.59       0.61      0.63       426     0.48       0.51      0.52

  2001Q3   173    0.67       0.69      0.70       358     0.60       0.63      0.66       373     0.47       0.50      0.52

  2001Q4   210    0.64       0.67      0.68       244     0.56       0.58      0.60       236     0.47       0.49      0.52

  2002Q1   196    0.68       0.70      0.72       373     0.63       0.63      0.66       390     0.50       0.52      0.57

  2002Q2   139    0.68       0.69      0.71       333     0.61       0.63      0.66       435     0.50       0.52      0.58

  2002Q3   125    0.68       0.71      0.73       358     0.60       0.64      0.67       439     0.54       0.56      0.60

  2002Q4   126    0.69       0.71      0.74       256     0.66       0.68      0.70       265     0.58       0.61      0.63

  2003Q1   104    0.71       0.73      0.76       319     0.63       0.69      0.72       377     0.57       0.59      0.63

  2003Q2   81     0.74       0.75      0.77       217     0.67       0.70      0.74       247     0.55       0.59      0.63
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004.

**Table A.8**

Estimated Purity of One Gram of Heroin, Quarterly Series

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
            ≤ 1                                   1-10                                    \>10                         
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1981Q1   128    0.01       0.13      0.15       104     0.01       0.09      0.14       85      0.01       0.06      0.10

  1981Q2   114    0.01       0.09      0.15       93      0.01       0.09      0.16       101     0.10       0.15      0.21

  1981Q3   126    0.01       0.10      0.15       123     0.01       0.10      0.18       95      0.08       0.14      0.19

  1981Q4   174    0.04       0.14      0.22       78      0.01       0.07      0.12       64      0.08       0.14      0.17

  1982Q1   160    0.01       0.13      0.24       168     0.02       0.17      0.26       90      0.17       0.25      0.30

  1982Q2   145    0.06       0.18      0.27       95      0.04       0.19      0.32       98      0.19       0.24      0.31

  1982Q3   143    0.11       0.20      0.27       104     0.10       0.23      0.34       74      0.22       0.29      0.35

  1982Q4   61     0.06       0.18      0.27       78      0.02       0.12      0.19       51      0.25       0.30      0.35

  1983Q1   100    0.02       0.11      0.18       90      0.01       0.09      0.15       69      0.17       0.24      0.31

  1983Q2   84     0.03       0.13      0.22       86      0.01       0.12      0.17       73      0.18       0.27      0.33

  1983Q3   94     0.07       0.17      0.25       93      0.01       0.11      0.17       89      0.23       0.29      0.37

  1983Q4   66     0.06       0.17      0.27       60      0.03       0.14      0.24       67      0.28       0.33      0.37

  1984Q1   71     0.01       0.12      0.19       55      0.01       0.13      0.21       61      0.29       0.34      0.42

  1984Q2   65     0.14       0.28      0.37       49      0.02       0.14      0.28       54      0.22       0.27      0.33

  1984Q3   66     0.20       0.26      0.32       71      0.06       0.15      0.27       63      0.29       0.33      0.38

  1984Q4   44     0.09       0.20      0.26       40      0.09       0.18      0.24       61      0.26       0.33      0.41

  1985Q1   62     0.12       0.23      0.29       80      0.13       0.21      0.31       64      0.27       0.35      0.43

  1985Q2   48     0.09       0.21      0.30       67      0.17       0.27      0.39       75      0.35       0.38      0.46

  1985Q3   60     0.16       0.24      0.31       69      0.09       0.22      0.32       87      0.35       0.38      0.46

  1985Q4   55     0.07       0.23      0.30       43      0.14       0.27      0.38       62      0.36       0.40      0.44

  1986Q1   56     0.19       0.30      0.39       59      0.22       0.29      0.37       87      0.33       0.36      0.46

  1986Q2   47     0.09       0.20      0.30       53      0.10       0.20      0.31       64      0.37       0.41      0.46

  1986Q3   45     0.20       0.29      0.42       30      0.15       0.26      0.36       55      0.31       0.35      0.41

  1986Q4   39     0.05       0.17      0.25       17      0.09       0.22      0.33       57      0.31       0.36      0.42

  1987Q1   43     0.05       0.17      0.23       21      0.04       0.25      0.27       66      0.22       0.27      0.32

  1987Q2   46     0.13       0.25      0.30       36      0.13       0.24      0.37       60      0.24       0.30      0.37

  1987Q3   53     0.17       0.28      0.37       37      0.14       0.25      0.37       64      0.36       0.41      0.47

  1987Q4   96     0.11       0.22      0.32       62      0.10       0.21      0.36       60      0.32       0.37      0.43

  1988Q1   90     0.14       0.27      0.40       46      0.15       0.30      0.42       78      0.38       0.44      0.49

  1988Q2   142    0.15       0.29      0.38       53      0.13       0.25      0.39       71      0.38       0.43      0.48
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.8**

**Estimated Purity of One Gram of Heroin, Quarterly Series (Continued)**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
            ≤ 1                                   1-10                                    \>10                         
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1988Q3   117    0.22       0.35      0.45       66      0.15       0.31      0.45       75      0.40       0.45      0.52

  1988Q4   87     0.15       0.27      0.39       53      0.21       0.32      0.43       52      0.39       0.43      0.50

  1989Q1   67     0.20       0.33      0.45       48      0.17       0.27      0.40       53      0.45       0.50      0.56

  1989Q2   60     0.18       0.31      0.40       37      0.17       0.26      0.33       62      0.43       0.49      0.59

  1989Q3   83     0.25       0.39      0.44       55      0.20       0.33      0.47       79      0.44       0.54      0.64

  1989Q4   58     0.17       0.28      0.39       40      0.25       0.35      0.44       71      0.44       0.54      0.64

  1990Q1   108    0.09       0.22      0.27       53      0.10       0.21      0.29       58      0.32       0.37      0.41

  1990Q2   119    0.12       0.24      0.30       31      0.13       0.23      0.33       69      0.29       0.35      0.43

  1990Q3   89     0.12       0.18      0.27       46      0.12       0.22      0.33       61      0.32       0.36      0.42

  1990Q4   99     0.13       0.31      0.32       26      0.21       0.32      0.38       48      0.27       0.38      0.41

  1991Q1   167    0.15       0.35      0.30       56      0.10       0.23      0.38       46      0.20       0.31      0.38

  1991Q2   188    0.18       0.31      0.38       68      0.15       0.27      0.38       61      0.34       0.40      0.48

  1991Q3   156    0.18       0.29      0.38       68      0.16       0.30      0.45       71      0.38       0.44      0.49

  1991Q4   83     0.15       0.29      0.33       33      0.15       0.26      0.33       40      0.42       0.46      0.52

  1992Q1   131    0.19       0.32      0.42       52      0.22       0.37      0.51       53      0.49       0.53      0.60

  1992Q2   117    0.28       0.43      0.47       41      0.23       0.35      0.50       81      0.39       0.45      0.57

  1992Q3   93     0.22       0.35      0.42       43      0.26       0.37      0.50       72      0.48       0.53      0.59

  1992Q4   131    0.27       0.40      0.45       38      0.30       0.41      0.56       54      0.55       0.60      0.65

  1993Q1   174    0.26       0.37      0.41       70      0.27       0.40      0.55       56      0.50       0.56      0.61

  1993Q2   157    0.28       0.41      0.49       72      0.33       0.43      0.56       60      0.54       0.59      0.64

  1993Q3   170    0.30       0.41      0.46       100     0.24       0.36      0.50       118     0.52       0.57      0.65

  1993Q4   120    0.30       0.44      0.50       60      0.30       0.43      0.54       48      0.56       0.61      0.70

  1994Q1   199    0.22       0.36      0.48       96      0.29       0.40      0.48       68      0.51       0.56      0.64

  1994Q2   175    0.21       0.41      0.58       85      0.23       0.39      0.51       81      0.46       0.53      0.58

  1994Q3   203    0.31       0.44      0.55       87      0.30       0.40      0.55       87      0.50       0.56      0.62

  1994Q4   176    0.28       0.43      0.65       85      0.28       0.44      0.60       70      0.50       0.56      0.66

  1995Q1   198    0.26       0.41      0.52       77      0.25       0.41      0.50       106     0.45       0.56      0.66

  1995Q2   223    0.33       0.49      0.54       92      0.27       0.43      0.53       77      0.53       0.58      0.67

  1995Q3   196    0.28       0.46      0.52       107     0.26       0.40      0.53       102     0.47       0.55      0.62

  1995Q4   181    0.32       0.43      0.55       69      0.30       0.42      0.52       55      0.42       0.48      0.55
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.8**

**Estimated Purity of One Gram of Heroin, Quarterly Series (Continued)**

  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------
            ≤ 1                                   1-10                                    \>10                         
           Gram                                   Grams                                   Grams                        

           Num.   1^st^                3^rd^      Num.    1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.   Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1996Q1   216    0.23       0.37      0.44       95      0.25       0.34      0.42       62      0.42       0.48      0.57

  1996Q2   226    0.28       0.37      0.46       113     0.23       0.37      0.50       101     0.35       0.39      0.46

  1996Q3   191    0.25       0.40      0.46       102     0.25       0.36      0.48       94      0.47       0.53      0.58

  1996Q4   197    0.26       0.39      0.50       94      0.28       0.41      0.55       73      0.51       0.56      0.62

  1997Q1   269    0.29       0.45      0.52       94      0.23       0.37      0.49       87      0.39       0.49      0.58

  1997Q2   236    0.28       0.40      0.48       120     0.31       0.39      0.51       107     0.44       0.50      0.58

  1997Q3   220    0.29       0.45      0.57       103     0.26       0.40      0.54       95      0.44       0.49      0.55

  1997Q4   50     0.36       0.50      0.59       42      0.36       0.43      0.55       79      0.49       0.54      0.61

  1998Q1   318    0.31       0.44      0.56       147     0.29       0.41      0.51       100     0.49       0.54      0.63

  1998Q2   215    0.32       0.48      0.58       142     0.29       0.44      0.54       141     0.51       0.55      0.62

  1998Q3   160    0.29       0.40      0.50       127     0.24       0.37      0.51       108     0.45       0.50      0.56

  1998Q4   206    0.28       0.46      0.60       118     0.25       0.42      0.58       101     0.50       0.56      0.63

  1999Q1   258    0.28       0.41      0.56       167     0.25       0.40      0.58       111     0.47       0.53      0.59

  1999Q2   255    0.25       0.41      0.51       161     0.23       0.37      0.52       98      0.43       0.48      0.56

  1999Q3   250    0.25       0.44      0.54       167     0.23       0.42      0.58       112     0.52       0.60      0.66

  1999Q4   190    0.23       0.43      0.56       108     0.26       0.39      0.55       88      0.52       0.59      0.65

  2000Q1   252    0.27       0.44      0.51       135     0.31       0.40      0.54       101     0.48       0.56      0.63

  2000Q2   205    0.26       0.43      0.53       167     0.22       0.38      0.54       114     0.43       0.53      0.61

  2000Q3   212    0.24       0.44      0.49       155     0.26       0.42      0.56       113     0.55       0.58      0.66

  2000Q4   210    0.27       0.41      0.48       87      0.22       0.37      0.53       65      0.56       0.61      0.69

  2001Q1   217    0.24       0.39      0.54       167     0.22       0.37      0.52       87      0.48       0.53      0.58

  2001Q2   219    0.24       0.40      0.50       140     0.26       0.39      0.55       103     0.50       0.58      0.64

  2001Q3   217    0.21       0.36      0.46       114     0.21       0.38      0.47       104     0.45       0.52      0.64

  2001Q4   217    0.23       0.40      0.53       79      0.21       0.36      0.45       60      0.49       0.55      0.61

  2002Q1   217    0.29       0.46      0.49       112     0.28       0.41      0.54       82      0.41       0.47      0.56

  2002Q2   224    0.24       0.39      0.51       147     0.28       0.40      0.54       83      0.45       0.50      0.57

  2002Q3   229    0.28       0.39      0.48       136     0.23       0.38      0.52       113     0.41       0.47      0.54

  2002Q4   79     0.24       0.40      0.52       69      0.28       0.40      0.55       50      0.42       0.49      0.56

  2003Q1   220    0.23       0.34      0.45       109     0.22       0.35      0.47       61      0.42       0.46      0.52

  2003Q2   42     0.23       0.29      0.43       51      0.23       0.33      0.41       43      0.41       0.46      0.52
  -------- ------ ---------- --------- ---------- ------- ---------- --------- ---------- ------- ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004.

**Table A.9**

Estimated Purity of One Gram of d-Methamphetamine, Quarterly Series

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1981Q1   20      0.19       0.35      0.51       20       0.33       0.48      0.68                                    

  1981Q2   11      0.34       0.50      0.66       7        0.41       0.55      0.76                                    

  1981Q3   8       0.19       0.36      0.52       10       0.39       0.51      0.70                                    

  1981Q4   7       0.40       0.56      0.72       8        0.33       0.48      0.67                                    

  1982Q1   14      0.28       0.44      0.61       19       0.33       0.48      0.67       8       0.29       0.33      0.37

  1982Q2   16      0.23       0.40      0.56       8        0.30       0.46      0.65                                    

  1982Q3   22      0.31       0.48      0.64       13       0.38       0.54      0.72                                    

  1982Q4   27      0.20       0.38      0.53       16       0.38       0.50      0.70                                    

  1983Q1   29      0.16       0.33      0.48       8        0.36       0.47      0.63                                    

  1983Q2   32      0.25       0.42      0.58       12       0.25       0.36      0.54                                    

  1983Q3   17      0.20       0.37      0.52       15       0.36       0.48      0.66                                    

  1983Q4   25      0.30       0.47      0.62       8        0.41       0.57      0.76       7       0.48       0.52      0.56

  1984Q1   31      0.19       0.36      0.49       8        0.16       0.30      0.47       8       0.43       0.46      0.49

  1984Q2   29      0.39       0.55      0.71       28       0.37       0.46      0.64       12      0.48       0.51      0.55

  1984Q3   18      0.26       0.43      0.59       13       0.22       0.38      0.57       12      0.50       0.53      0.57

  1984Q4   32      0.28       0.43      0.60       19       0.34       0.49      0.68       6       0.33       0.36      0.40

  1985Q1   37      0.16       0.32      0.49       32       0.36       0.44      0.62       13      0.44       0.47      0.51

  1985Q2   11      0.28       0.45      0.61       13       0.29       0.39      0.50                                    

  1985Q3   21      0.35       0.51      0.67       9        0.60       0.68      0.86                                    

  1985Q4   28      0.23       0.40      0.56       16       0.40       0.49      0.68       8       0.37       0.40      0.44

  1986Q1   39      0.33       0.49      0.66       22       0.30       0.44      0.63                                    

  1986Q2   22      0.41       0.58      0.74       14       0.28       0.40      0.58       6       0.37       0.40      0.44

  1986Q3   29      0.30       0.46      0.62       14       0.33       0.44      0.63       6       0.53       0.56      0.60

  1986Q4   23      0.40       0.55      0.72       9        0.23       0.37      0.56                                    

  1987Q1   25      0.39       0.56      0.72       18       0.35       0.51      0.70       5       0.28       0.32      0.36

  1987Q2   29      0.37       0.52      0.69       25       0.31       0.43      0.62                                    

  1987Q3   22      0.34       0.51      0.67       13       0.31       0.46      0.64                                    

  1987Q4   41      0.27       0.44      0.59       18       0.28       0.43      0.62                                    

  1988Q1   66      0.40       0.56      0.72       40       0.33       0.49      0.68       9       0.48       0.52      0.56

  1988Q2   59      0.41       0.58      0.75       30       0.38       0.54      0.72       9       0.45       0.49      0.53
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.9**

**Estimated Purity of One Gram of d-Methamphetamine, Quarterly Series
(Continued)**

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1988Q3   29      0.38       0.55      0.71       36       0.31       0.47      0.66       8       0.38       0.43      0.47

  1988Q4   29      0.40       0.57      0.73       27       0.39       0.52      0.70       8       0.62       0.65      0.69

  1989Q1   35      0.40       0.57      0.73       33       0.40       0.53      0.71       8       0.39       0.45      0.49

  1989Q2   27      0.38       0.55      0.70       20       0.43       0.56      0.74                                    

  1989Q3   23      0.25       0.43      0.58       22       0.35       0.51      0.70                                    

  1989Q4   30      0.22       0.38      0.54       17       0.29       0.42      0.60                                    

  1990Q1   25      0.27       0.43      0.59       25       0.10       0.26      0.45                                    

  1990Q2   16      0.17       0.34      0.50       27       0.09       0.24      0.43       8       0.09       0.13      0.16

  1990Q3   19      0.21       0.37      0.53       26       0.18       0.33      0.52       10      0.16       0.19      0.23

  1990Q4   18      0.23       0.41      0.64       16       0.25       0.33      0.51       8       0.31       0.34      0.38

  1991Q1   32      0.20       0.37      0.61       27       0.24       0.38      0.57       10      0.31       0.34      0.38

  1991Q2   17      0.23       0.39      0.55       28       0.17       0.33      0.52       10      0.37       0.41      0.44

  1991Q3   17      0.26       0.43      0.59       26       0.13       0.28      0.47       9       0.26       0.30      0.34

  1991Q4   10      0.10       0.26      0.42       25       0.09       0.26      0.43       8       0.58       0.63      0.66

  1992Q1   11      0.29       0.46      0.62       31       0.22       0.37      0.56       9       0.12       0.17      0.19

  1992Q2   17      0.42       0.60      0.75       28       0.24       0.40      0.58       14      0.40       0.44      0.48

  1992Q3   24      0.46       0.62      0.78       32       0.38       0.53      0.70       12      0.67       0.70      0.74

  1992Q4   12      0.25       0.42      0.58       29       0.34       0.51      0.70       8       0.54       0.57      0.61

  1993Q1   28      0.48       0.64      0.80       18       0.31       0.47      0.66       8       0.62       0.66      0.70

  1993Q2   22      0.39       0.56      0.72       21       0.27       0.42      0.57                                    

  1993Q3   25      0.25       0.41      0.58       35       0.46       0.62      0.81       17      0.59       0.62      0.66

  1993Q4   37      0.53       0.69      0.85       33       0.43       0.59      0.78       11      0.64       0.68      0.71

  1994Q1   28      0.55       0.71      0.87       37       0.50       0.66      0.85       32      0.66       0.69      0.73

  1994Q2   31      0.61       0.76      0.94       55       0.46       0.66      0.86       26      0.68       0.72      0.76

  1994Q3   37      0.59       0.76      0.92       59       0.58       0.73      0.92       20      0.70       0.72      0.77

  1994Q4   39      0.57       0.74      0.90       46       0.56       0.69      0.88       23      0.65       0.68      0.71

  1995Q1   50      0.52       0.68      0.84       74       0.57       0.67      0.86       26      0.71       0.75      0.78

  1995Q2   40      0.53       0.70      0.86       105      0.57       0.70      0.82       41      0.64       0.69      0.72

  1995Q3   71      0.40       0.55      0.72       57       0.43       0.60      0.78       24      0.39       0.42      0.45

  1995Q4   54      0.16       0.32      0.41       35       0.10       0.26      0.44       17      0.05       0.09      0.12
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

**Table A.9**

**Estimated Purity of One Gram of d-Methamphetamine, Quarterly Series
(Continued)**

  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------
           ≤ 10                                    10-100                                   \>100                        
           Grams                                   Grams                                    Grams                        

           Num.    1^st^                3^rd^      Num.     1^st^                3^rd^      Num.    1^st^                3^rd^

  Period   Obs.    Quartile   Average   Quartile   Obs.     Quartile   Average   Quartile   Obs.    Quartile   Average   Quartile

  1996Q1   29      0.34       0.52      0.72       61       0.25       0.41      0.60       16      0.15       0.19      0.23

  1996Q2   44      0.32       0.48      0.57       60       0.23       0.38      0.58       32      0.33       0.37      0.41

  1996Q3   25      0.37       0.54      0.70       49       0.34       0.46      0.65       47      0.37       0.41      0.45

  1996Q4   38      0.45       0.62      0.78       85       0.35       0.51      0.70       52      0.33       0.37      0.41

  1997Q1   46      0.50       0.67      0.82       101      0.39       0.54      0.73       44      0.40       0.45      0.48

  1997Q2   45      0.53       0.71      0.87       118      0.36       0.49      0.68       57      0.41       0.45      0.49

  1997Q3   56      0.40       0.55      0.72       141      0.39       0.51      0.65       52      0.40       0.44      0.48

  1997Q4   74      0.34       0.49      0.66       151      0.29       0.44      0.59       66      0.37       0.41      0.44

  1998Q1   76      0.37       0.54      0.77       164      0.26       0.37      0.47       79      0.22       0.25      0.29

  1998Q2   71      0.21       0.37      0.54       156      0.10       0.20      0.29       65      0.07       0.11      0.14

  1998Q3   63      0.16       0.34      0.49       143      0.08       0.18      0.31       86      0.04       0.08      0.11

  1998Q4   47      0.20       0.37      0.43       153      0.15       0.27      0.41       95      0.05       0.10      0.13

  1999Q1   64      0.18       0.36      0.51       125      0.11       0.24      0.39       93      0.06       0.10      0.13

  1999Q2   58      0.26       0.42      0.59       105      0.17       0.31      0.50       89      0.12       0.15      0.19

  1999Q3   73      0.30       0.47      0.63       166      0.20       0.37      0.55       120     0.16       0.19      0.23

  1999Q4   67      0.31       0.48      0.64       127      0.18       0.35      0.52       97      0.17       0.20      0.23

  2000Q1   72      0.29       0.46      0.62       136      0.20       0.31      0.51       132     0.18       0.22      0.24

  2000Q2   82      0.36       0.54      0.71       170      0.18       0.30      0.46       108     0.16       0.19      0.22

  2000Q3   49      0.32       0.49      0.65       154      0.19       0.35      0.52       124     0.15       0.19      0.22

  2000Q4   39      0.41       0.58      0.74       106      0.21       0.37      0.52       102     0.15       0.19      0.23

  2001Q1   69      0.36       0.52      0.69       134      0.23       0.40      0.65       112     0.15       0.18      0.22

  2001Q2   57      0.42       0.58      0.74       157      0.21       0.40      0.57       142     0.19       0.22      0.25

  2001Q3   74      0.47       0.62      0.78       155      0.26       0.49      0.74       158     0.24       0.28      0.31

  2001Q4   66      0.38       0.55      0.71       136      0.23       0.38      0.51       85      0.22       0.25      0.29

  2002Q1   74      0.48       0.64      0.85       156      0.32       0.48      0.65       118     0.22       0.25      0.29

  2002Q2   95      0.49       0.61      0.82       161      0.28       0.45      0.64       104     0.24       0.28      0.31

  2002Q3   60      0.48       0.65      0.84       154      0.32       0.50      0.69       115     0.26       0.30      0.33

  2002Q4   55      0.49       0.66      0.87       98       0.30       0.47      0.72       79      0.30       0.34      0.37

  2003Q1   79      0.40       0.59      0.75       184      0.47       0.56      0.69       89      0.29       0.34      0.37

  2003Q2   39      0.48       0.64      0.81       105      0.42       0.55      0.74       55      0.38       0.42      0.46
  -------- ------- ---------- --------- ---------- -------- ---------- --------- ---------- ------- ---------- --------- ----------

Source: System to Retrieve Information on Drug Evidence (STRIDE).

Prepared by: RAND Corporation, February 2004.