E-cigarette and cigarette purchasing among young adults before and after implementation of California's tobacco 21 policy.
Sara J SchiffFei LiuTess Boley CruzJennifer Beth UngerSamantha N CwalinaAdam M LeventhalRob McConnellJessica Barrington-TrimisPublished in: Tobacco control (2020)
Post-T21, few participants were refused purchase of any tobacco product, despite the illegality of such sales. Better enforcement of T21 is needed to improve the efficacy of T21 legislation.