Implementing medical marijuana laws does not impact the rate of adolescent use. The removing of marijuana from a street to inside a licensed medical marijuana dispensary decreased usage among youths. Recent reports have examined and found that, in the majority of medical marijuana states, youth used decreased after the medical marijuana law was passed. The out of curiosity reason and peer pressure among young people in using marijuana declined because marijuana laws serve now as protection.
"Our results are not consistent with the hypothesis that the legalization of medical marijuana caused an increase in the use of marijuana and other substances among high school students. In fact, estimates from our preferred specification are small, consistently negative, and are never statistically distinguishable from zero. " Those are the statements of authors who conducted the recent study to determine the effect of medical marijuana laws on adolescent marijuana use. They further said that using the 95 percent confidence interval around these estimates suggests that the impact of legalizing medical marijuana on the probability of marijuana use in the past 30 days is no larger than 0.8 percentage points, and the impact of legalization on the probability of frequent marijuana use in the past 30 days is no larger than 0.7 percentage points.
So with regards to impact on youth use, decriminalization of marijuana use does not necessarily lead to a substantial increase in marijuana use. In fact, this decriminalization of marijuana has not been found to have an impact on adult use, too.