Does legalizing recreational marijuana in a state lead its residents to use it, or other substances, more? How does legalization impact careers, family life and mental health? Are some people more vulnerable to its negative impacts than others?
These are some of the questions CeDAR's Dr. Christian Hopfer and University of Colorado researchers hope to help answer via a sweeping new $5.5-million study of 5,000 twins funded by the National Institute on Drug Abuse (NIDA). It is the first and only study of its kind in the nation.