I Did What Last Night? Adolescent Risky Sexual Behaviors and Substance Abuse

Risky sexual behaviors by teenagers have shown to be strongly correlated with drug and alcohol consumption. The purpose of this study is to examine the question of whether alcohol and drug use increases the likelihood that teenagers will engage in four risky sexual behaviors: having sex, sex with multiple partners, sex without a condom, and sex without birth control. Two-stage least squares and a reduced form model are used to account for the potential endogeneity of substance use. The finding that alcohol consumption (as defined by either heavy drinking or drinking any amount) is unrelated to the probability of having sex is consistent with the findings of previous studies that also account for the potential endogeneity of alcohol consumption. The findings imply that the risky behaviors of sexually active teens, who may have made the decision long ago to become sexually active, might be altered through policies designed to reduce alcohol consumption.