Changes in E-Cigarette and Cigarette Sales in California and Neighboring States Following a Law Prohibiting Flavored Tobacco Product Sales

Objectives. To assess changes in e-cigarette and cigarette sales, overall and by flavor type, following implementation of California's law prohibiting flavored tobacco product sales. Methods. E-cigarette and cigarette retail sales data were licensed from Circana, categorized by flavor, and summed into quarters during 2019 to 2024. We used difference-in-differences regressions with 2-way fixed effects to compare quarterly sales per capita before and after implementation of the Calif