As well as instantly making the state the stoner capital of America, the move allows for unprecedented data-gathering. Within the year, we could discover whether legal availability erases black market sales, and whether traffic accidents decrease as drinkers switch to marijuana, says Jonathan Caulkins of Carnegie Mellon University in Pittsburgh, Pennsylvania. "It will also be interesting to see if we get a noticeable decline in jail populations, as fewer people are arrested for illegally selling or using marijuana," he says.
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