DOI: 10.3886/icpsr13395
title: Census of Population and Housing, 2000 [United States]: Selected Subsets From Summary File 1, States
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 [UNITED
 STATES]: SUMMARY FILE 1, STATES (ICPSR 3194). Summary File 1 data
 contain information compiled from the questions asked of all people
 and of every housing unit enumerated in Census 2000: sex, age, race,
 Hispanic or Latino origin, type of living quarters (household/group
 quarters), household relationship, housing unit vacancy status, and
 housing unit tenure (owner/renter). The information is presented in
 286 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. Each subset comprises all of the cases in one of two
 summary levels: whole census tracts (summary level 140) and census
 tracts in places (summary level 158). The latter covers whole tracts
 completely within places and portions of tracts that cross place
 boundaries. Five files are provided for each subset. There is a file
 for each of the four census regions (East, Midwest, South, and West)
 and a combined national file. Puerto Rico is included in the national
and South files.
description: Datasets: 
DS0: Study-Level Files
DS1: Whole Census Tracts, the Nation
DS2: Whole Census Tracts, Northeast Only
DS3: Whole Census Tracts, Midwest Only
DS4: Whole Census Tracts, South Only
DS100: Data Dictionary
DS101: SAS Data Definition Statements
DS5: Whole Census Tracts, West Only
DS102: SPSS Data Definition Statements
DS6: Census Tracts in Places, the Nation
DS7: Census Tracts in Places, Northeast Only
DS103: Stata Data Definition Statements
DS8: Census Tracts in Places, Midwest Only
DS9: Census Tracts in Places, South Only
DS10: Census Tracts in Places, West Only
description: All persons and housing units in the United States.
description: (1) The original Summary File 1, States data comprise
 2,080 files. For each state (District of Columbia and Puerto Rico
 included), there is one column-delimited file that contains geographic
 identifiers (the geographic header record file or "Geo" file), plus 39
 comma-delimited table files, each with a subset of tables in the
 data. For reasons of confidentiality, table files 12-36 do not contain
 data below the tract level. Consequently, they have fewer records than
 the Geo file and table files 1-11 and 37-39. The subsets were produced
 piece by piece, one state at a time. Initial steps in the production
 of a subset for a state involved sorting its Geo file and 39 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 1-11
 and 37-39, and stripping off the first five identification variables
 from each of the 39 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 state subset
 was generated by extracting from the merged file all cases with a
 given value for SUMLEV, the variable that identifies the summary
 level. Separate subsets were generated for summary levels 140 and
 158. After subsets were produced for every state, the national and
 regional files were compiled by concatenating component state subsets
 in ascending order of their state Federal Information Processing
 Standards (FIPS) codes. (2) The following states are included in the
 four 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. (3) The implied decimal places in variables
 INTPTLAT (latitude) and INTPTLON (longitude) were made explicit in the
 subsets. In addition, the values of all Geo variables were enclosed in
 quotes, except for variables AREALAND, AREAWATR, POP100, HU100,
 INTPTLAT, and INTPTLON. (4) The data definition statements were tested
 with SAS 8, SPSS 10, and Stata/SE 7.0. (5) 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 file provided with this
 collection. In particular, the "Data Structure and Segmentation"
 section in chapter 2 of the codebook and the variable locations shown
 in chapter 7 do not apply to the subsets. Every subset file record
 begins with the Geo variables in their original order. The Geo
 variables are followed by the 6th to last variables in table file 1,
 then the 6th to last variables in table file 2, and so on up to the
 6th to last variables in table file 39. (6) The codebook is provided
 by the principal investigator 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.