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Washington State Institute for Public Policy
September 2017
Initiative 502, passed by Washington voters in November 2012, legalized the limited adult possession and private consumption of cannabis, as well as its licensed production and sale. The initiative directs WSIPP to evaluate the impact of the law in a series of reports between 2015 and 2032.

In this second required report we address preliminary findings from analyses of effects of I-502 on non-monetary outcomes. We used two main analysis strategies. We examined the effect of I-502 enactment on cannabis abuse treatment admissions, comparing Washington to similar non-legalizing states before and after I-502 enactment. We also examined how local differences in the amount of legal cannabis sales affected cannabis abuse treatment admissions, youth and adult substance use, and drug-related criminal convictions.

These analyses represent an intermediate step towards the ultimate benefit-cost evaluation of I-502 that is required by the law.



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Madeline Barch
Bethanne Barnes
Kristofer Bitney
Julia Cramer
Adam Darnell
Elizabeth Drake
Danielle Fumia
Rebecca Goodvin
Lijian He
Michael Hirsch
Chasya Hoagland
Stephanie Lee
Marna Miller
Catherine Nicolai
Eva Westley
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