A handful of US cities have passed soda taxes, but are they working?

In March 2015, Berkeley, California became the first city in the United States to enact a soda tax: a one-cent surcharge on every ounce of sugar-sweetened drinks sold. In the five years since, several other cities—including San Francisco, Oakland, Boulder, Colorado, Seattle, and Philadelphia—have passed their own beverage ballot initiatives. A new study published in the May edition of the journal Economics & Human Biology, for example, explored how a tax on soda played out in Seattle.