Uses of the Social Security Work History Sample in Studying Metropolitan Migration.
Describes two examples of how our understanding of the migration process has been broadened by the Social Security Work History Sample. In the first, the sample is used as a longitudinal register from which individual migration histories can be developed. Through it we see how analysis of migration histories can illuminate processes of local population growth and decline. In the second, the sample serves as a source of time series on gross migration flows into and out of metropolitan areas. The example demonstrates how data on short-term migration can sharpen our theories about the way migration flows respond to economic differentials among metropolitan areas. Both examples highlight the need to identify the natural dynamics of population movements in formulating policies on the labor force and on urban growth. 9 pp. Ref.