Research suggests that as neighboring states, provinces, or countries adopt a policy, the pressure for adoption increases among lagging jurisdictions.
Has the U.S. reached the “tipping point” in marijuana legalization?
That’s what one CNN commentator said happened last month when, on June 26, Oklahoma adopted medical marijuana through a ballot initiative — making it the 30th state to do so.
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Daniel J. Mallinson and A. Lee Hannah - WashingtonPost.com ~