The social norms of birth cohorts and adolescent marijuana use in the United States, 1976-2007
Katherine M. Keyes, PhD, John E. Schulenberg, PhD Patrick M. O’Malley, PhD, Lloyd D. Johnston, PhD, Jerald G. Bachman, PhD, Guohua Li, MD DrPH, Deborah Hasin, PhD.
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Please cite this article as a “Postprint”; doi: 10.1111/j.1360-0443.2011.03485.x