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. National Longitudinal Survey of Youth, 1979 (ICPSR 34924) Ohio State University. Center for Human Resource Research 2. National Longitudinal Survey of Youth, 1997 (ICPSR 34923) Ohio State University. Center for Human Resource Research 3. Youth Development Study, 1988-2004 [St. Paul, Minnesota] (ICPSR 24881) Mortimer, Jeylan T.