Marijuana is the most common illicit drug with vocal advocates for legalization. Among other things, legalization would increase access and remove the stigma of illegal behavior. Our model of use disentangles the role of access from preferences and shows that selection into access is not random. We …nd that non-selection-corrected demand estimates are biased resulting in incorrect policy conclu...

BACKGROUND As marijuana legalization and acceptability increase in the U.S., it is important to understand the potential impact on tobacco use. Accordingly, we assessed prevalence, correlates, and ten-year trends in co-use of marijuana and tobacco among U.S. adults. METHODS Data came from 378,459 adults participating in the 2003-2012 National Survey on Drug Use and Health, an annual, cross-se...

Purpose of Review This article provides an overview of current federal, state, and relevant international “medical marijuana” policies. We also describe the impacts of “medical marijuana” policy on adolescents’ use of marijuana and other substances. Recent Findings Evidence on the medical benefits of marijuana in adolescents is limited in the context of risks for marijuana-related harm. The leg...

BACKGROUND California may vote on marijuana legalization in 2016. Young adults have the highest rates of marijuana use, but little is known about the correlates of use in this age group, including factors that may be affected by policy change. We investigated whether there are differences in marijuana use by sociodemographic characteristics, psychological distress, loneliness and social support...

In December 2012, the possession and private use of limited quantities of marijuana and marijuana products became legal in the state of Washington. At the same time, the state's driving under the influence statutes were amended to include a per se level of 5 ng/mL delta(9)-tetrahydrocannabinol (THC) in whole blood for drivers aged 21 years and older. The aim of this study was to assess the effe...

Purpose of Review There is not one answer to address whether marijuana use has increased, decreased, or stayed the same given changes in state legalization of medical and non-medical marijuana in the USA. Recent Findings Evidence suggests some health benefits for medical marijuana; however, initiation of marijuana use is a risk factor for developing problem cannabis use. Though use rates have...