Extending the Utility of Federal Data Bases. Combining Data for Several Years


It is clear that with the exception of the National Vital Statistics data sets, the Census 2000, and the ACS, the surveys can provide only limited information on race/ethnic subpopulations. The Mexican-American samples are adequate in most of the surveys but cross-classifications will rarely be possible for the other groups. Sections 4, 5, and 6 describe ways of enhancing the samples. In this section we discuss what is probably the simplest and least costly way of doing this, that is combining several years of data. The discussion, of course, omits the NVS, Census 2000, and the ACS, since the existing sample sizes are fully adequate.