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J Health Econ. 2019 Dec 28;70:102283. doi: 10.1016/j.jhealeco.2019.102283. [Epub ahead of print]

Sex, marijuana and baby booms.

Author information

1
University of Connecticut, United States. Electronic address: michele.baggio@uconn.edu.
2
Georgia State University, United States and Universidad del Pacifico, Peru. Electronic address: achong6@gsu.edu.
3
University of Connecticut and NBER, United States. Electronic address: david.simon@uconn.edu.

Abstract

We study the behavioral changes caused by marijuana use on sexual activity, contraception, and birth counts by applying a differences-in-differences approach that exploits the variation in timing of the introduction of medical marijuana laws (MMLs) among states. We find that MMLs cause an increase in sexual activity, a reduction in contraceptive use conditional on having sex, and an increase in number of births. There is also suggestive evidence on temporary increases in the state-year gonorrhea rate. These changes may be attributed to behavioral responses including increased attention to the immediate hedonic effects of sexual contact, increased sexual frequency, as well as delayed discounting and ignoring the future costs associated with sex. Our findings on births suggest that behavioral factors can counteract the physiological changes from marijuana use that tend to decrease fertility. Our findings are robust to a broad set of tests.

KEYWORDS:

Behavior; Contraceptive use; Fertility; Marijuana laws; Sexual activity

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