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Washington State Institute for Public Policy

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Preventing and Treating Youth Marijuana Use: An Updated Review of the Evidence
Open Publication PDF

Matt Lemon, Annie Pennucci, Sean Hanley, Steve Aos - October 2014

Initiative 502, passed by Washington voters in November 2012, legalized recreational cannabis use for adults in the state. The initiative directs WSIPP to evaluate the policy in a series of reports between 2015 and 2032.

As part of this assignment, we reviewed the evaluation literature on 23 youth marijuana prevention and treatment programs. This review updates an earlier report that focused on a subset of the programs; to view the initial report click here.

Download:   Report    Benefit-Cost Results  
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Legislation