Study Search Results Your query returned 1 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. Monitoring the Future: A Continuing Study of American Youth (12th-Grade Survey), 2006 (ICPSR 20022) Johnston, Lloyd D.; Bachman, Jerald G.; O'Malley, Patrick M.; et al.