https://www.sciencedaily.com/releases/2019/04/190402131422.htm

The election, and the vigorous campaigning around the tax that led up to the vote, also may have played a major role in changing habits, shows a new study by economists at the University of California, Berkeley.

The study authors analyzed food and drink purchases at UC Berkeley-owned dining facilities and in drug stores in the city of Berkeley before and after residents voted in favor of levying a penny-per-ounce tax on all sugar-sweetened beverages.