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Jerald G. Bachman, Lloyd D. Johnston, Patrick M. O'Malley, Ronald H. Humphrey, Explaining the Recent Decline in Marijuana Use: Differentiating the Effects of Perceived Risks, Disapproval, and General Lifestyle Factors, Journal of Health and Social Behavior, Vol. 29, No. 1 (Mar., 1988), pp. 92-112
Bachman et al. (Tue,) studied this question.
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