# **Table 1a:  Summary Statistics**

|||1975‐2<br>Std|015<br># of||1985‐2<br>Std|015<br># of||1995‐2<br>Std|015<br># of|
|---|---|---|---|---|---|---|---|---|---|
|**Full Sample**|Mean|.<br>Dev.|<br>obs|Mean|.<br>Dev.|<br>obs|Mean|.<br>Dev.|<br>obs|
|**_Project Outcome Ratings_**||||||||||
|IEG Satisfactory (1)/Unsatisfacotry (0)Rating|0.72|0.45|7,386|0.70|0.46|5,963|0.72|0.45|4,021|
|IEG 6‐point Rating|||||||4.00|1.17|4,021|
|**_Evaluation Characteristics_**||||||||||
|Years between completion and evaluation|2.31|1.79|7,085|2.12|1.57|5,718|1.71|1.22|3,799|
|Dummy=1 for detailed PPAR Review|0.36|0.48|7,436|0.26|0.44|6,006|0.18|0.38|4,052|
|**_Macro Variables(averaged overproject life)_**||||||||||
|Logof Real GDPper capitagrowth,averaged overproj.|2.58|3.68|7,188|2.58|3.76|5,895|3.19|3.79|4,038|
|LogCPI averaged overproject life|2.36|1.25|6,878|2.30|1.34|5,704|2.13|1.17|3,916|
|CPIA score(1=bad,6=good)||||3.40|0.70|5,924|3.56|0.53|3,992|
|**_Basic Project Characteristics_**||||||||||
|Logaritnm ofproject net commmitment(US m$)|3.15|1.26|7,436|3.28|1.26|6,006|3.39|1.26|4,052|
|Years from Approval to Completion|6.31|1.86|7,436|6.44|1.87|6,006|6.49|1.93|4,052|
|Prepartion Costs/Commitment, (%)|1.88|4.72|7,436|2.22|5.12|6,006|2.59|5.66|4,052|
|Supervision Costs/Commitment, (%)|2.64|4.82|7,392|3.04|5.22|6,005|3.70|5.82|4,051|
|Dummy=1 if EApresent in both PAD and ICR<br>|0.39|0.49|7,436|0.33|0.47|6,006|0.28|0.45|4,052|
|Logarithm of the absolute difference between the ERR in<br>PAD and that in ICR|‐1.39|1.39|2,880|‐1.41|1.34|1,993|‐1.52|1.34|1,122|
|Share of High‐CBA projects, %|66.0|||63.3|||55.4|||
|**_Early Warning Indicators_**||||||||||
|Dummy=1 ifproject was restructed in first half|||||||0.06|0.23|3,853|
|Dummy=1 if potential problem project flag in 1rst half||||0.34|0.47|4,967|0.32|0.47|4,041|
|||1975‐2|015||1985‐2|015||1995‐2|015|
|**Limisted Sample**|Mean|Dev.|obs|Mean|Dev.|obs|Mean|Dev.|obs|
|**_Project Outcome Ratings_**||||||||||
|IEG Satisfactory (1)/Unsatisfacotry (0)Rating|0.78|0.42|2,880|0.77|0.42|1,993|0.82|0.39|1,122|
|IEG 6‐point Rating|||||||4.30|1.06|1,122|
|**_Evaluation Characteristics_**||||||||||
|Years between completion and evaluation|2.36|1.66|2,752|2.16|1.51|1,907|1.53|0.88|1,052|
|Dummy=1 for detailed PPAR Review|0.42|0.49|2,880|0.27|0.44|1,993|0.12|0.33|1,122|
|**_Macro Variables(averaged overproject life)_**||||||||||
|Real GDPper capitagrowth,%|2.76|3.34|2,735|2.83|3.36|1,935|3.67|3.27|1,116|
|LogCPI averaged overproject life|2.38|1.16|2,621|2.28|1.29|1,896|2.12|1.22|1,098|
|CPIA score(1=bad,6=good)||||3.42|0.72|1,967|3.61|0.51|1,110|
|**_Basic Project Characteristics_**||||||||||
|Logaritnm ofproject net commmitment(US m$)|3.40|1.19|2,880|3.69|1.15|1,993|3.94|1.11|1,122|
|Years from Approval to Completion|6.32|1.82|2,880|6.56|1.82|1,993|6.68|1.87|1,122|
|Prepartion Costs/Commitment, (%)|1.01|2.18|2,880|1.31|2.46|1,993|1.47|2.41|1,122|
|Supervision Costs/Commitment, (%)|1.40|2.34|2,860|1.69|2.65|1,993|2.02|2.92|1,122|
|Dummy=1 if EApresent in both PAD and ICR|1.00|0.00|2,880|1.00|0.00|1,993|1.00|0.00|1,122|
|Logarithm of the absolute difference between the ERR in<br>PAD and that in ICR|‐1.39|1.39|2,880|‐1.41|1.34|1,993|‐1.52|1.34|1,122|
|Share of High‐CBA projects, %|97.1|||95.9|||93.1|||
|**_Early Warning Indicators_**||||||||||
|Dummy=1 ifproject was restructed in first half|||||||0.06|0.24|1,037|
|Dummy=1 ifpotentialproblemproject flagin 1rst half||||0.33|0.47|1,503|0.33|0.47|1,121|
|Dummy=1 ifproblemproject flagin first half||||0.40|0.49|893|0.40|0.49|893|

Sources: This table reports summary statistics on measured project outcomes (0/1 or 1‐6 scale), as well as summary statistics on all correlates of project outcomes reported in Tables 6 to 15.

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