Impact of Recreational Cannabis Legalization in Michigan: A Baseline Report
May 2020
Cannabis use in MI is increasing.
MI residents reporting symptoms of cannabis use disorder have remained stable since 2002.
Number of residents using cannabis for medical purposes has increased.
Percentage of cannabis related auto vehicle fatalities is increasing.
Suicide and homicide victims often test positive for cannabis.
Emergency hospital visits due to cannabis are increasing.
Impacts of Marijuana Legalization - Colorado
Oct 2018
Number of serious marijuana related crimes have remained consistent with pre-legalization levels.
Organized crime cases have increased since 2008
Marijuana related impairment citations has remained about the same
The percent of drivers in fatal crashes that tested positive for MJ decreased from 2016 to 2017.
The number of fatalities where driver tested positive for any level of cannabis increased.
State is not seeing an impact of recreational mj use on school drop out rate.
Surveys show CO is not seeing an increase in youth usage of marijuana.
Cannabis Effect on Crime: Time-Series Analysis of Crime in Colorado and Washington State
2019
Legalization of recreational marijuana has had a minimal effect on major crime in CO and WA
Observed virtually no statistically significant long-term effects of recreational marijuana legalization or retail sales on violent or property crime rates, except for a significant decline of burglary rates in Washington.
There were some immediate increases in crime at the point of legalization, but these did not result in long-term effects.
Marijuana Baseline Health Study - MA
2019
Tools to reliably ascertain levels of marijuana exposure and impairment in the field do not currently exist.
Retrospective evaluations of fatal crash data suggest that drivers who died in a fatal crash are much more likely to have had their blood tested for marijuana, than drivers who survived a crash in which there was at least one fatality.
The number of marijuana-related calls to the Regional Poison Control Center in Massachusetts has been increasing over time.