Cannabis is widely used among adolescents and adults. In the US, marijuana laws have
been changing, and Americans increasingly favor legalizing cannabis for medical and …

Background: The past decade has seen unprecedented shifts in the cannabis policy
environment, and the public health impacts of these changes will hinge on how they affect …

Aims To conduct a systematic review and meta‐analysis of studies in order to estimate the
effect of US medical marijuana laws (MMLs) on past‐month marijuana use prevalence …

Aims To estimate the effect of recreational legalization on cannabis use frequency and
sources of variance across legal environments. Design Longitudinal discordant twin and …

Objectives To examine the effect of cannabis policy liberalisation (decriminalisation and
legalisation) levels of use in adolescents and young adults. Design Systematic review and …

Objectives To review the metrics and findings of studies evaluating effects of drug
decriminalisation or legal regulation on drug availability, use or related health and social …

Objectives. To assess the association between medical marijuana laws (MMLs) and the
odds of a positive opioid test, an indicator for prior use. Methods. We analyzed 1999–2013 …

Objective: Adult cannabis use has increased in the United States since 2002, particularly
after 2007, contrasting with stable/declining trends among youth. We investigated whether …

Background Historical shifts have taken place in the last twenty years in marijuana policy.
The impact of medical marijuana laws (MML) on use of substances other than marijuana is …

In recent years, several jurisdictions have revised their regulation policy toward both medical
and recreational use of cannabis. These changes have elicited concerns regarding how …