Study Search Results Your query returned 3 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Most Downloaded (?) Study Title/Investigator 1. Harlem Longitudinal Study of Urban Black Youth, 1968 United States (ICPSR 121) Brunswick, Ann 2. National Supported Work Evaluation Study, 1975-1979: Public Use Files (ICPSR 7865) Manpower Demonstration Research Corporation 3. New Hope Project: Income and Employment Effects on Children and Families, 1994-2003 [Restricted Use] (ICPSR 30282) Huston, Aletha; Miller, Cynthia; Duncan, Greg; et al.