Assessing the Effects of Medical Marijuana Laws on Marijuana and Alcohol Use: The Devil is in the Details

42 Pages Posted: 10 Aug 2013

See all articles by Rosalie Liccardo Pacula

Rosalie Liccardo Pacula

Health Economics, Finance and Organization, RAND Corporation; National Bureau of Economic Research (NBER)

David Powell

RAND Corporation

David Powell

RAND Corporation

Paul S. Heaton

University of Pennsylvania Law School

Eric L Sevigny

Georgia State University

Date Written: August 2013

Abstract

This paper sheds light on previous inconsistencies identified in the literature regarding the relationship between medical marijuana laws (MML) and recreational marijuana use by closely examining the importance of policy dimensions (registration requirements, home cultivation, dispensaries) and the timing of them. Using data from our own legal analysis of state MMLs, we evaluate which features are associated with adult and youth recreational use by linking these policy variables to data from the National Longitudinal Survey of Youth (NLSY97), the Youth Risk Behavior Survey (YRBS) and the Treatment Episodes Data System (TEDS). Our analyses control for state and year fixed effects, using within state policy changes over time to estimate the effect on changes in our outcome variables using a difference-in-differences approach. We find that while simple dichotomous indicators are generally not associated with marijuana use, specific dimensions of MMLs, namely home cultivation and legal dispensaries, are positively associated with marijuana use in each data set. Moreover, these same dimensions are tied to binge drinking and fatal alcohol automobile accidents as well. The findings have important implications for states considering legalization of marijuana, as regulating access to and promotion of dispensaries may be key for reducing the harms associated with these policies.

Suggested Citation

Pacula, Rosalie Liccardo and Powell, David and Powell, David and Heaton, Paul S. and Sevigny, Eric L, Assessing the Effects of Medical Marijuana Laws on Marijuana and Alcohol Use: The Devil is in the Details (August 2013). NBER Working Paper No. w19302. Available at SSRN: https://ssrn.com/abstract=2308271

Rosalie Liccardo Pacula (Contact Author)

Health Economics, Finance and Organization, RAND Corporation ( email )

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National Bureau of Economic Research (NBER)

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David Powell

RAND Corporation ( email )

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David Powell

RAND Corporation ( email )

1776 Main Street
P.O. Box 2138
Santa Monica, CA 90407-2138
United States

Paul S. Heaton

University of Pennsylvania Law School ( email )

3501 Sansom Street
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United States

HOME PAGE: http://https://www.law.upenn.edu/cf/faculty/pheaton/

Eric L Sevigny

Georgia State University ( email )

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Atlanta, GA GA 30306
United States
14044131038 (Phone)

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