In 2014, Colorado began selling recreational cannabis to people older than 21, becoming the first state to legalize recreational marijuana. A new study evaluated the effect of recreational and medical marijuana dispensaries on crime in Denver. The study found that street segments with recreational dispensaries saw no changes in violent, disorder, and drug crime, but experienced significantly higher levels of property crime. Street segments adjacent to recreational dispensaries experienced higher levels of drug and disorder crimes, although the increases were not statistically significant for either type of crime. And street segments with and adjacent to medical dispensaries saw no significant changes in crime. The study concluded that the costs of these crimes were largely offset by the sales revenue generated by recreational dispensaries.