Search Results Use the search box below to revise your search, or start a new search. Studies (2) Variables Publications Your query returned 2 studies. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. United States Microdata Samples Extract File, 1940-1980: Demographics of Aging (ICPSR 8353) Inter-university Consortium for Political and Social Research 2. Youth-Parent Socialization Panel Study, 1965-1973 (ICPSR 7779) Jennings, M. Kent; Niemi, Richard G.