Get High and Get Stupid: The Effect of Alcohol and Marijuana Use on Teen Sexual Behavior

Numerous studies have documented a strong correlation between substance use and teen sexual behavior, and this empirical relationship has given rise to a widespread belief that substance use causes teens to engage in risky sex. This causal link is often used by advocates to justify policies targeted at reducing substance use. Here, we argue that previous research has not produced sufficient evidence to substantiate a causal relationship between substance use and teen sexual behavior. Accordingly, we attempt to estimate causal effects using two complementary research approaches. Our findings suggest that substance use is not causally related to teen sexual behavior, although we cannot definitively rule out that possibility.Research for this paper was supported by grant number 5 R01 DA12692 from the National Institute on Drug Abuse to the National Bureau of Economic Research. We are indebted to Inas Rashad and Nasreen Khan for research assistance. We wish to thank Donald Kenkel, Jody Sindelar, David Salkever, David Bishai, Eric Slade, and two anonymous referees for helpful comments and suggestions. Our research is based in part on the Add Health project, a program project designed by J. Richard Udry (PI) and Peter Bearman, and funded by grant PO1-HD31921 from the National Institute of Child Health and Human Development to the Carolina Population Center, University of North Carolina at Chapel Hill, with cooperative funding participation by the National Cancer Institute; the National Institute of Alcohol Abuse and Alcoholism; the National Institute on Deafness and Other Communication Disorders; the National Institute on Drug Abuse; the National Institute of General Medical Sciences; the National Institute of Mental Health; the National Institute of Nursing Research; the Office of AIDS Research, NIH; The Office of Behavior and Social Science Research, NIH; the Office of the Director, NIH; the Office of Research on Womens Health, NIH; the Office of Population Affairs, DHHS; the National Center for Health Statistics, Centers for Disease Control and Prevention, DHHS; the Office of Minority Health, Center for Disease Control and Prevention, DHHS; the Office of Minority Health, Office of Public Health and Science, DHHS; the Office of the Assistant Secretary for Planning and Evaluation, DHHS; and the National Science Foundation. Persons interested in obtaining data files from The National Longitudinal Study of Adolescent Health should contact Add Health Project, Carolina Population Center, 123 West Franklin Street, Chapel Hill, NC 27516-3997 (email: addhealth@unc.edu). This paper has not undergone the review accorded to official NBER publications; in particular, it has not been submitted for approval by the Board of Directors. Any opinions expressed are those of the authors and not those of NIDA or NBER.JEL Classification: I10, I11