Do state tobacco 21 laws work?

Author / Creator

Bryan, Calvin, author

Available as

Online

Summary

Tobacco 21 (T-21) laws prohibit the sale of tobacco products to individuals under age 21. This study is the first to comprehensively examine the impacts of statewide T-21 laws on youth tobacco cons...

Tobacco 21 (T-21) laws prohibit the sale of tobacco products to individuals under age 21. This study is the first to comprehensively examine the impacts of statewide T-21 laws on youth tobacco consumption, including spillovers to minor teens. Using data from the 2009-2019 Behavioral Risk Factor Surveillance Survey (BRFSS) and a difference-in-differences approach, we find that the enactment of a statewide T-21 law was associated with a 2.5 to 4.0 percentage-point decline in smoking participation among 18-to-20-year-olds. A causal interpretation of our estimates is supported by event-study analyses and falsification tests for young adults ages 21 and older. Next, using data from the 2009-2019 State Youth Risky Behavior Surveys (YRBS), we find that statewide T-21 laws reduced tobacco cigarette and electronic cigarette (e-cigarette) consumption among 18-year-old high school students. We also find that the public health benefits of T-21 laws extend to 16-to-17-year-olds, a group that relies heavily on the "social market" -- including 18-year-old peers -- to access tobacco. We conclude increasing the minimum legal purchasing age for tobacco to 21 appears to be a more effective current policy strategy to deter youth smoking than raising cigarette taxes.

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