Search Results Use the search box below to revise your search, or start a new search. Studies (9) Variables Publications Your query returned 3 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results. Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance 1. National Youth Survey [United States]: Wave VII, 1987 (ICPSR 6542) Elliott, Delbert 6 more results in National Youth Survey (NYS) Series 2. Iowa Youth and Families Project, 1989-1992 (ICPSR 26721) Conger, Rand D.; Lasley, Paul; Lorenz, Frederick O.; et al. 3. Project on Human Development in Chicago Neighborhoods (PHDCN): Service Use, Wave 2, 1997-2000 (ICPSR 13656) Earls, Felton J.; Brooks-Gunn, Jeanne; Raudenbush, Stephen W.; et al.