NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Sietse Goffard

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NBER Working Papers and Publications

September 2017The Effects of Marijuana Liberalizations: Evidence from Monitoring the Future
with Angela K. Dills, Jeffrey Miron: w23779
By the end of 2016, 28 states had liberalized their marijuana laws: by decriminalizing possession, by legalizing for medical purposes, or by legalizing more broadly. More states are considering such policy changes even while supporters and opponents continue to debate their impacts. Yet evidence on these liberalizations remains scarce, in part due to data limitations. We use data from Monitoring the Future’s annual surveys of high school seniors to evaluate the impact of marijuana liberalizations on marijuana use, other substance use, alcohol consumption, attitudes surrounding substance use, youth health outcomes, crime rates, and traffic accidents. These data have several advantages over those used in prior analyses. We find that marijuana liberalizations have had minimal impact on th...
 
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