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States that passed medical marijuana laws saw a significant boost to older Americans’ workforce participation, according to a new working paper from researchers at Johns Hopkins and Temple University. States with medical marijuana laws also saw improvements in overall health for older men, although the health effects for older women were more mixed.

Like many recent studies examining the effects of marijuana laws, this one compared what happened in medical marijuana states before and after the passage of medical pot provisions, and compared them to trajectories in similar states that did not implement medical marijuana. The data come from the Health and Retirement study, a long-running survey of the health and economic well-being of older American adults.

The study found that, among individuals age 50 and older, “passage of [a medical marijuana law] leads to a 9.4 percent increase in the probability of employment and a 4.6 percent to 4.9 percent increase in hours worked per week.” [Read more at Washington Post]