| Summary: | This extraction of data from the 1990 decennial Census files (CENSUS OF POPULATION AND HOUSING, 1990 [UNITED STATES]: SUMMARY TAPE FILES 3A AND 3B [ICPSR 9694, 9693]) was designed to provide a set of contextual variables to be matched to any survey dataset that has been coded for the geographic location of respondents. Over 120 variables were selected from original Census sources, and more than 100 variables were derived from those component variables. The variables characterize geographic areas in terms of ethnicity, family structures, income, education, labor force activity, and housing. The geographic areas chosen range from neighborhoods (tracts, Block Numbering Areas [BNAs], and Enumeration Districts [EDs]), through intermediate levels of geography (Minor Civil Divisions and Census County Divisions [MCDs/CCDs], census places, and ZIP codes), through large economic areas (counties, Metropolitan Statistical Areas, State Economic Areas [SEAs], and specially created Labor Market Areas [LMAs]), and beyond to large regions (Economic Sub-Regions [ESRs] and states). To the maximum extent possible, the investigator selected Census variables that seemed relevant to problems associated with poverty and income determination and that were present in comparable form in the 1970 and 1980 Census datasets.
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