DOI: 10.3886/icpsr13402
title: Census of Population and Housing, 2000 [United States]: Selected Subsets From Summary File 3
title: Archival Version

description: Prepared by the Inter-university Consortium for Political and
 Social Research, this data collection consists of selected subsets
 extracted from the Census of Population and Housing, 2000, Summary File
 3 (SF3). The SF3 data contain information compiled from the questions
 asked of a sample of persons and housing units enumerated in Census
 2000. Population items include sex, age, race, Hispanic or Latino
 origin, household relationship, marital status, caregiving by
 grandparents, language and ability to speak English, ancestry, place of
 birth, citizenship status and year of entry to the United States,
 migration, place of work, journey to work, school enrollment,
 educational attainment, veteran status, disability, employment status,
 industry, occupation, class of worker, income, and poverty status.
 Housing items include housing unit vacancy status, housing unit tenure
 (owner/renter), number of rooms, number of bedrooms, year moved into
 unit, occupants per room, units in structure, year structure built,
 heating fuel, telephone service, plumbing and kitchen facilities,
 vehicles available, value of home, rent, and shelter costs. The
 information in SF3 is presented in 813 tables, one variable per table
 cell, plus additional variables with geographic information. Cases in
 the summary file data are classified by levels of observation, known as
 "summary levels" in the Census Bureau's nomenclature, which served as
 the selection criteria for the subsets generated by ICPSR. Each subset
 comprises all of the cases in one of 10 summary levels: the nation
 (summary level 010), states (summary level 040), Metropolitan
 Statistical Areas (MSA)/Consolidated Metropolitan Statistical Areas
 (CMSA) (summary level 380), Primary Metropolitan Statistical Areas
 (PMSA) (summary level 385), places (summary level 160), counties
 (summary level 050), county subdivisions (summary level 060), whole
 census tracts (summary level 140), census tracts in places (summary
 level 158), and 5-Digit ZIP Code Tabulation Areas (ZCTA) (summary level
 860). Four files are supplied for the summary level 860 subset: a single
 file that contains all of the SF3 tables, plus three smaller files, each
 of which contains about one third of the tables. Five files are supplied
 for each of the summary level 010, 040, 380, 385, 160, and 050 subsets:
 a single file that contains all of the SF3 tables, plus four smaller
 files, each of which contains approximately one quarter of the tables.
 Fifteen files are provided for each of the summary level 140 and 158
 subsets. There is a national file with all of the SF3 tables, plus two
 smaller national files, each of which contains approximately one half of
 the tables. Additionally, there are three files for each of the four
 census regions (Northeast, Midwest, South, and West): a file with all
 tables and two smaller files each containing about one half of the
 tables. Twenty files are supplied for summary level 060. There is a
 national file with all tables, plus three smaller national files, each
 of which contains approximately one third of the tables. In addition,
 there are four files for each of the four census regions: a file with
 all tables and three smaller files each containing about one third of
the tables.
description: Every person and housing unit in the United States was asked
 basic demographic and housing questions, for example, race, age,
 relationship to householder, housing unit vacancy status, and housing
 unit tenure. A sample of these people and housing units was asked more
 detailed questions about items, such as income, occupation, and housing
 costs. The sampling unit for Census 2000 was the housing unit, including
 all occupants. There were four different housing unit sampling rates:
 1-in-8, 1-in-6, 1-in-4, and 1-in-2 (designed for an overall average of
 about 1-in-6). The Census Bureau assigned these varying rates based on
 pre-census occupied housing unit estimates of various geographic and
 statistical entities, such as incorporated places and interim census
 tracts. For people living in group quarters or enumerated at long-form
 eligible service sites (shelters and soup kitchens), the sampling unit
was the person and the sampling rate was 1-in-6.
description: Datasets: 
DS0: Study-Level Files
DS1: States, All Tables
DS2: States, Tables P1-P160I Only
DS3: States, Tables PCT1-PCT68C Only
DS4: States, Tables PCT68D-H26 Only
DS261: Stata Data Definition Statements for Complete Files (Parts 1, 6, 11, 16, 19, 22, 25, 28, 31, 36, 41, 46, 50, 54, 58, 62, 66, 70, 73, 76, 79, and 82)
DS5: States, Tables H27-HCT48I Only
DS262: Stata Data Definition Statements for First Half Files (Parts 17, 20, 23, 26, 29, 71, 74, 77, 80, and 83)
DS6: MSA/CMSAs, All Tables
DS7: MSA/CMSAs, Tables P1-P160I Only
DS263: Stata Data Definition Statements for Second Half Files (Parts 18, 21, 24, 27, 30, 72, 75, 78, 81, and 84)
DS264: Stata Data Definition Statements for First Quarter Files (Parts 2, 7, 12, 32, 37, and 42)
DS8: MSA/CMSAs, Tables PCT1-PCT68C Only
DS265: Stata Data Definition Statements for Second Quarter Files (Parts 3, 8, 13, 33, 38, and 43)
DS9: MSA/CMSAs, Tables PCT68D-H26 Only
DS266: Stata Data Definition Statements for Third Quarter Files (Parts 4, 9, 14, 34, 39, and 44)
DS10: MSA/CMSAs, Tables H27-HCT48I Only
DS11: Counties, All Tables
DS267: Stata Data Definition Statements for Fourth Quarter Files (Parts 5, 10, 15, 35, 40, and 45)
DS268: Stata Data Definition Statements for First Third Files (Parts 47, 51, 55, 59, 63, and 67)
DS12: Counties, Tables P1-P160I Only
DS269: Stata Data Definition Statements for Second Third Files (Parts 48, 52, 56, 60, 64, and 68)
DS13: Counties, Tables PCT1-PCT68C
DS14: Counties, Tables PCT68D-H26 Only
DS270: Stata Data Definition Statements for Third Third Files (Parts 49, 53, 57, 61, 65, and 69)
DS15: Counties, Tables H27-HCT48I Only
DS16: Whole Census Tracts, the Nation, All Tables
DS17: Whole Census Tracts, the Nation, Tables P1-PCT69I Only
DS18: Whole Census Tracts, the Nation, Tables PCT70A-HCT48I Only
DS19: Whole Census Tracts, Northeast Only, All Tables
DS20: Whole Census Tracts, Northeast, Tables P1-PCT69I Only
DS21: Whole Census Tracts, Northeast, Tables PCT70A-HCT48I Only
DS22: Whole Census Tracts, Midwest Only, All Tables
DS23: Whole Census Tracts, Midwest, Tables P1-PCT69I Only
DS24: Whole Census Tracts, Midwest, Tables PCT70A-HCT48I Only
DS25: Whole Census Tracts, South Only, All Tables
DS26: Whole Census Tracts, South, Tables P1-PCT69I Only
DS27: Whole Census Tracts, South, Tables PCT70A-HCT48I Only
DS28: Whole Census Tracts, West Only, All Tables
DS29: Whole Census Tracts, West, Tables P1-PCT69I Only
DS30: Whole Census Tracts, West, Tables PCT70A-HCT48I Only
DS31: The Nation, All Tables
DS32: The Nation, Tables P1-P160I Only
DS33: The Nation, Tables PCT1-PCT68C Only
DS34: The Nation, Tables PCT68D-H26 Only
DS35: The Nation, Tables H27-HCT48I Only
DS36: PMSAs, All Tables
DS37: PMSAs, Tables P1-P160I Only
DS38: PMSAs, Tables PCT1-PCT68C Only
DS39: PMSAs, Tables PCT68D-H26 Only
DS40: PMSAs, Tables H27-HCT48I Only
DS41: Places, All Tables
DS42: Places, Tables P1-P160I Only
DS43: Places, Tables PCT1-PCT68C Only
DS44: Places, Tables PCT68D-H26 Only
DS45: Places, Tables H27-HCT48I Only
DS46: County Subdivisions, the Nation, All Tables
DS47: County Subdivisions, the Nation, Tables P1-PCT27 Only
DS48: County Subdivisions, the Nation, Tables PCT28-PCT73G Only
DS49: County Subdivisions, the Nation, Tables PCT73H-HCT48I Only
DS50: County Subdivisions, Northeast Only, All Tables
DS51: County Subdivisions, Northeast, Tables P1-PCT27 Only
DS52: County Subdivisions, Northeast, Tables PCT28-PCT73G Only
DS53: County Subdivisions, Northeast, Tables PCT73H-HCT48I Only
DS54: County Subdivisions, Midwest Only, All Tables
DS55: County Subdivisions, Midwest, Tables P1-PCT27 Only
DS56: County Subdivisions, Midwest, Tables PCT28-PCT73G Only
DS57: County Subdivisions, Midwest, Tables PCT73H-HCT48I Only
DS58: County Subdivisions, South Only, All Tables
DS59: County Subdivisions, South, Tables P1-PCT27 Only
DS60: County Subdivisions, South, Tables PCT28-PCT73G Only
DS61: County Subdivisions, South, Tables PCT73H-HCT48I Only
DS62: County Subdivisions, West Only, All Tables
DS63: County Subdivisions, West, Tables P1-PCT27 Only
DS64: County Subdivisions, West, Tables PCT28-PCT73G Only
DS65: County Subdivisions, West, Tables PCT73H-HCT48I Only
DS66: 5-Digit ZCTAs, All Tables
DS67: 5-Digit ZCTAs, Tables P1-PCT27 Only
DS68: 5-Digit ZCTAs, Tables PCT28-PCT73G Only
DS69: 5-Digit ZCTAs, Tables PCT73H-HCT48I Only
DS70: Census Tracts in Places, the Nation, All Tables
DS71: Census Tracts in Places, the Nation, Tables P1-PCT69I Only
DS72: Census Tracts in Places, the Nation, Tables PCT70A-HCT48I Only
DS73: Census Tracts in Places, Northeast Only, All Tables
DS74: Census Tracts in Places, Northeast, Tables P1-PCT69I Only
DS75: Census Tracts in Places, Northeast, Tables PCT70A-HCT48I Only
DS76: Census Tracts in Places, Midwest Only, All Tables
DS77: Census Tracts in Places, Midwest, Tables P1-PCT69I Only
DS78: Census Tracts in Places, Midwest, Tables PCT70A-HCT48I Only
DS79: Census Tracts in Places, South Only, All Tables
DS80: Census Tracts in Places, South, Tables P1-PCT69I Only
DS81: Census Tracts in Places, South, Tables PCT70A-HCT48I Only
DS82: Census Tracts in Places, West Only, All Tables
DS83: Census Tracts in Places, West, Tables P1-PCT69I Only
DS84: Census Tracts in Places, West, Tables PCT70A-HCT48I Only
DS201: Data Dictionary for Complete Files (Parts 1, 6, 11, 16, 19, 22, 25, 28, 31, 36, 41, 46, 50, 54, 58, 62, 66, 70, 73, 76, 79, and 82)
DS202: Data Dictionary for First Half Files (Parts 17, 20, 23, 26, 29, 71, 74, 77, 80, and 83)
DS203: Data Dictionary for Second Half Files (Parts 18, 21, 24, 27, 30, 72, 75, 78, 81, and 84)
DS204: Data Dictionary for First Quarter Files (Parts 2, 7, 12, 32, 37, and 42)
DS205: Data Dictionary for Second Quarter Files (Parts 3, 8, 13, 33, 38, and 43)
DS206: Data Dictionary for Third Quarter Files (Parts 4, 9, 14, 34, 39, and 44)
DS207: Data Dictionary for Fourth Quarter Files (Parts 5, 10, 15, 35, 40, and 45)
DS208: Data Dictionary for First Third Files (Parts 47, 51, 55, 59, 63, and 67)
DS209: Data Dictionary for Second Third Files (Parts 48, 52, 56, 60, 64, and 68)
DS210: Data Dictionary for Third Third Files (Parts 49, 53, 57, 61, 65, and 69)
DS221: SAS Data Definition Statements for Complete Files (Parts 1, 6, 11, 16, 19, 22, 25, 28, 31, 36, 41, 46, 50, 54, 58, 62, 66, 70, 73, 76, 79, and 82)
DS222: SAS Data Definition Statements for First Half Files (Parts 17, 20, 23, 26, 29, 71, 74, 77, 80, and 83)
DS223: SAS Data Definition Statements for Second Half Files (Parts 18, 21, 24, 27, 30, 72, 75, 78, 81, and 84)
DS224: SAS Data Definition Statements for First Quarter Files (Parts 2, 7, 12, 32, 37, and 42)
DS225: SAS Data Definition Statements for Second Quarter Files (Parts 3, 8, 13, 33, 38, and 43)
DS226: SAS Data Definition Statements for Third Quarter Files (Parts 4, 9, 14, 34, 39, and 44)
DS227: SAS Data Definition Statements for Fourth Quarter Files (Parts 5, 10, 15, 35, 40, and 45)
DS228: SAS Data Definition Statements for First Third Files (Parts 47, 51, 55, 59, 63, and 67)
DS229: SAS Data Definition Statements for Second Third Files (Parts 48, 52, 56, 60, 64, and 68)
DS230: SAS Data Definition Statements for Third Third Files (Parts 49, 53, 57, 61, 65, and 69)
DS241: SPSS Data Definition Statements That Merge the Two Half Files (Parts 17-18, 20-21, 23-24, 26-27, 29-30, 71-72, 74-75, 77-78, 80-81, and 83-84)
DS242: SPSS Data Definition Statements for First Half Files (Parts 17, 20, 23, 26, 29, 71, 74, 77, 80, and 83)
DS243: SPSS Data Definition Statements for Second Half Files (Parts 18, 21, 24, 27, 30, 72, 75, 78, 81, and 84)
DS244: SPSS Data Definition Statements That Merge the Four Quarter Files (Parts 2-5, 7-10, 12-15, 32-35, 37-40, and 42-45)
DS245: SPSS Data Definition Statements for First Quarter Files (Parts 2, 7, 12, 32, 37, and 42)
DS246: SPSS Data Definition Statements for Second Quarter Files (Parts 3, 8, 13, 33, 38, and 43)
DS247: SPSS Data Definition Statements for Third Quarter Files (Parts 4, 9, 14, 34, 39, and 44)
DS248: SPSS Data Definition Statements for Fourth Quarter Files (Parts 5, 10, 15, 35, 40, and 45)
DS249: SPSS Data Definition Statements That Merge the Three Third Files (Parts 47-49, 51-53, 55-57, 59-61, 63-65, and 67-69)
DS250: SPSS Data Definition Statements for First Third Files (Parts 47, 51, 55, 59, 63, and 67)
DS251: SPSS Data Definition Statements for Second Third Files (Parts 48, 52, 56, 60, 64, and 68)
DS252: SPSS Data Definition Statements for Third Third Files (Parts 49, 53, 57, 61, 65, and 69)
description: All persons and housing units in the United States.
description: (1) The original SF3 data comprise 4,081 files. For the
 nation as a whole, every state, the District of Columbia, and Puerto
 Rico, there is one column-delimited file that contains geographic
 identifiers (the geographic header record file or "Geo" file), plus 76
 comma-delimited table files, each of which contains a portion of the SF3
 tables. For states, the District of Columbia, and Puerto Rico, the
 variables in the Geo file and table files 1-18 and 56-62 are shown down
 to the block group level, but the variables in table files 19-55 and
 63-76 are only shown down to the census tract level. Consequently, table
 files 19-55 and 63-76 have fewer records than the Geo file and table
 files 1-18 and 56-62. In comparison, every one of 77 national files has
 the same number of cases. (2) The summary level 010, 040, 380, 385, 160,
 050, 060, and 860 subsets were generated from the 77 national level
 files. Initial steps in the production of each of these subsets involved
 sorting the national-level Geo file and 76 table files in ascending
 order of the common identification variable LOGRECNO, reformatting the
 Geo file as a comma-delimited file, and stripping off the first five
 identification variables from each of the 76 table files (FILEID,
 STUSAB, CHARITER, CIFSN, and LOGRECNO). Next, the reformatted Geo file
 was merged with the stripped table files, so that corresponding records
 in the Geo and table files were joined as a single record in the merged
 file. The nth record of the merged file was created by concatenating the
 nth record of the reformatted Geo file, the nth record of the first
 stripped table file, the nth record of the second stripped table file,
 and so on, up to the nth record of the 76th stripped table file.
 Finally, the subset was generated by extracting from the merged file all
 cases with a given value for SUMLEV, the variable that identifies the
 summary level. For example, the states subset was produced by extracting
 all cases coded 040 for SUMLEV. (3) The summary level 140 and 158
 subsets were produced one state at a time from the 4,004 state files
 (including the District of Columbia and Puerto Rico). Initial steps in
 the production of a subset for a state involved sorting its Geo file and
 76 table files in ascending order of the common identification variable
 LOGRECNO, reformatting the Geo file as a comma-delimited file, removing
 records with data below the tract level from table files 1-18 and 56-62
 and corresponding records in the Geo file, and stripping off the first
 five identification variables from each of the 76 table files. Next, the
 reformatted Geo file was merged with the stripped table files so that
 corresponding records in the Geo and table files were joined as a single
 record in the merged file. A state subset was generated by extracting
 from the merged file all cases with a given value for SUMLEV, i.e., 140
 or 158. After subsets were produced for every state, the national and
 regional subsets were generated by combining their component state
 subsets in ascending order of their state Federal Information Processing
 Standards (FIPS) codes. (4) Due to the large size of the summary level
 140, 158, and 060 subsets, which may be too large for some systems,
 these subsets are also provided as four smaller regional files:
 Northeast, South, Midwest, and West. The following states are included
 in the regional files. Northeast: Connecticut, Massachusetts, Maine, New
 Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and
 Vermont. Midwest: Iowa, Illinois, Indiana, Kansas, Michigan, Minnesota,
 Missouri, North Dakota, Nebraska, Ohio, South Dakota, and Wisconsin.
 South: Alabama, Arkansas, District of Columbia, Delaware, Florida,
 Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina,
 Oklahoma, South Carolina, Tennessee, Texas, Virginia, West Virginia, and
 Puerto Rico. West: Alaska, Arizona, California, Colorado, Hawaii, Idaho,
 Montana, New Mexico, Nevada, Oregon, Utah, Washington, and Wyoming. (5)
 To allow for compatibility with SPSS 10, which cannot read raw data
 files with a record length greater than 32,767, the summary file
 subsets, including the regional files, are supplied as smaller component
 files, each with a record length less than the SPSS limit. These
 component files supplement the complete files containing all of the SF3
 variables, all of which have record lengths much larger than 32,767.
 Four component files are provided for the summary level 010, 040, 380,
 385, 160, and 050 subsets: a "first quarter" file with the Geo variables
 and tables P1-P160I, a "second quarter" file with the Geo variables and
 tables PCT1-PCT68C, a "third quarter" file with the Geo variables and
 tables PCT68D-H26, and a "fourth quarter" file with the Geo variables
 and tables H27-HCT48I. Three component files are supplied for the
 summary level 060 and 860 subsets: a "first third" file with the Geo
 variables and tables P1-PCT27, a "second third" file with the Geo
 variables and tables PCT28-PCT73G, and a "third third" file with the Geo
 variables and tables PCT73H-HCT48I. Two component files are supplied for
 the summary level 140 and 158 subsets: a "first half" file with the Geo
 variables and tables P1-PCT69I and a "second half" file with the Geo
 variables and tables PCT70A-HCT48I. (6) The implied decimal places in
 variables INTPTLAT (latitude) and INTPTLON (longitude) in the original
 data files were made explicit in the subsets. Additionally, the values
 of all the Geo variables were enclosed in quotes in the subsets, except
 for variables AREALAND, AREAWATR, POP100, HU100, INTPTLAT, and INTPTLON.
 (7) The data definition statements were tested with SAS 8, SPSS 10, and
 Stata/SE 8. (8) The codebook is provided by the principal investigators
 as a Portable Document Format (PDF) file. The PDF file format was
 developed by Adobe Systems Incorporated and can be accessed using PDF
 reader software, such as the Adobe Acrobat Reader. Information on how to
 obtain a copy of the Acrobat Reader is provided on the ICPSR Web site.
 (9) The codebook documents data collection procedures, concepts, and
 individual variables in the original Summary File data as well as the
 ICPSR-produced subsets, but not the layout and structure of the subsets.
 That information is contained in the data dictionary files provided with
 this collection. (10) Each subset contains all of the geographic
component iterations in its summary level, if any.