Recreational marijuana use is now legal in four states and medical marijuana in 23 states. Research on legalization policies has focused largely on how they impact marijuana access and use. But the UW team—led by School of Social Work researcher and lecturer Katarína Guttmannová—wanted to know how legalization affects the use of alcohol, by far the nation’s most popular drug. Does legal marijuana tempt pot users to consume more alcohol — or are they likely to opt for cannabis instead of chardonnay?