“A working paper published Monday (PDF) claims that, despite the insistence of numerous U.S. officials, legalizing medical marijuana had no distinguishable effect on teen drug abuse rates in the surrounding communities.”
“Drawing upon data from 13 states from 1993 – 2009, professors from Montana State University, the University of Oregon and the University of Colorado Denver found that medical marijuana actually had a negative impact on the consumption of cocaine, the use of which declined 1.9 percent in areas that had legalized medical marijuana. It had no statistically significant impact on teen marijuana use.”