Study Search Results Your query returned 4 results. Series results are grouped under the most relevant study. You can ungroup series results. Results per page: 25 50 100 Sort by: Study Relevance Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Variable Relevance (?) Study Title/Investigator 1. National Survey of Parents and Youth (NSPY), 1998-2004 -- Restricted Use Files (ICPSR 27868) David, Susan; Hornik, Robert; Maklan, David 2. Project on Human Development in Chicago Neighborhoods (PHDCN): Drug Use, Wave 3, 2000-2002 (ICPSR 13694) Earls, Felton J.; Brooks-Gunn, Jeanne; Raudenbush, Stephen W.; et al. 13 more results in Project on Human Development in Chicago Neighborhoods (PHDCN) Series 3. Toledo Adolescent Relationships Study (TARS): Wave 1, 2001 (ICPSR 4679) Giordano, Peggy C.; Longmore, Monica A.; Manning, Wendy D. 1 more results in Toledo Adolescent Relationships Study (TARS) Series 4. National Comorbidity Survey: Adolescent Supplement (NCS-A), 2001-2004 (ICPSR 28581) Kessler, Ronald C.