Search Results Use the search box below to revise your search, or start a new search. Studies (3) Variables Publications Your query returned 2 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. Monitoring the Future: A Continuing Study of American Youth (12th-Grade Survey), 2015 (ICPSR 36408) Johnston, Lloyd D.; Bachman, Jerald G.; O'Malley, Patrick M.; et al. 1 more result in Monitoring the Future (MTF) Series 2. Schools and Families Educating (SAFE) Children Study [Chicago, IL]: 1997-2008 (ICPSR 34368) Tolan, Patrick; Gorman-Smith, Deborah; Henry, David; et al.