[Scitr]

"Overall, we find that the impact of decriminalization is concentrated amongst minors, who have a higher rate of uptake in the first five years following its introduction."

http://scitr.com/a2a

"Early initiation of cannabis use and regular use during adolescence are particular risk factors for later problematic cannabis and other drug use, as well as mental health problems, delinquency, loss of cognitive capacity and educational achievement, risky sexual behavior and criminal offending."

http://scitr.com/a29 http://scitr.com/a2b