This paper uses crowd-sourced transaction data from a cross-section of the US to examine demand for marijuana. State and regional variations in consumption, price and quality are explored. Price elasticity of demand estimates range between -0.3 and -0.6. Noticeable price differences are found between high, medium, and low quality marijuana, with high quality marijuana, at $13.57 per gram, 144% ...

Chronic marijuana intake was known to induce morphological changes to the brain impairing memory and learning ability. However, several studies demonstrated the protective effect of marijuana post-brain traumas. This article reviews studies that strengthen our horizon to understand the effects of marijuana smoking in brain. This review predicts that optimum use of marijuana or pure marijuana co...

In The Lancet Psychiatry, Deborah Hasin and colleagues review the relationship between US state medical marijuana laws and adolescent use of marijuana. Marijuana is the most commonly used illicit drug, both worldwide and in the USA, where around 19·8 million Americans use it per month. Although millions use it for recreational or medicinal purposes, the risks of regular use, including cognitive...

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...

Marijuana is the most widely used illicit substance in those diagnosed with bipolar I disorder. However, there is conflicting evidence as to whether marijuana may alleviate or exacerbate mood symptomatology. As bipolar disorder and marijuana use are individually associated with cognitive impairment, it also remains unclear whether there is an additive effect on cognition when bipolar patients u...

AIMS Studies of the relationship between social norms and marijuana use have generally focused on individual attitudes, leaving the influence of larger societal-level attitudes unknown. The present study investigated societal-level disapproval of marijuana use defined by birth cohort or by time-period. DESIGN Combined analysis of nationally representative annual surveys of secondary school st...

Legalization of marijuana for recreational use has increased the overall consumption of Cannabis spp. in Alaska, Colorado, Washington, and Oregon. We review the evidence regarding the impact of marijuana use during pregnancy and breastfeeding including evidence for adverse effects on infant and child neurodevelopment maturation and cognitive function. Based on animal and limited human studies o...

BACKGROUND The literature widely reports that stress is associated with marijuana use, yet, to date, the path from stress to marijuana-related problems has not been tested. In this study, we evaluated whether negative affect mediates the relationship between stress and marijuana use. METHODS To that end, we tested models to determine mediators between problems with marijuana use (via Marijuan...

INTRODUCTION Marijuana is the most commonly used illicit substance in the U.S., with high rates among young adults in the state of Colorado. Chronic, heavy marijuana use can impact cognitive functioning, which has the potential to influence academic performance of college students. It is possible that craving for marijuana may further contribute to diminished cognitive and affective functioning...

According to the 'acquired preparedness model,' expectancies mediate the relationship between an impulsive personality style and alcohol use. The current study evaluated whether the model can also be applied to marijuana use. Estimated probabilities and subjective evaluations of personally expected marijuana effects, along with impulsivity and frequency of marijuana use, were assessed in 337 co...