Selected Subsets from Summary File 1
Prepared by the Inter-university Consortium for Political and Social Research, these two data collections consist of selected subsets extracted from the Census of Population and Housing, 2000 [United States]: Summary File 1, Advanced National (ICPSR 3325) and 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 persons 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, which are tabulated for every case, i.e., every geographic unit represented in the data. There is one variable per table cell, plus additional variables with geographic information. Cases in the data are classified by levels of observation, known as "summary levels," in the Census Bureau's nomenclature. These levels of observation served as the selection criteria for the subsets. Each subset comprises all of the cases in one of seven summary levels. Five subsets were extracted from ICPSR 3325: the nation (summary level 010), states (summary level 040), counties (summary level 050), places (summary level 160), and 5-Digit ZIP Code Tabulation Areas (summary level 860). Two subsets were generated from ICPSR 3194: whole census tracts (summary level 140) and census tracts in places (summary level 158). The latter subset covers tracts completely within places and portions within places of tracts that cross place boundaries.