.STUDY: “Do Medical Marijuana Laws Increase Marijuana Use?”

“CONCLUSION: Accounting for confounding by unmeasured state characteristics and measurement error had an important effect on estimates of the impact of MMLs on marijuana use. We find limited evidence of causal effects of MMLs on measures of reported marijuana use.” — from “Do Medical Marijuana Laws Increase Marijuana Use? Replication Study and Extension“, published in the Annals of Epidemiology.

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