The public health costs of tobacco consumption have been documented to be substantially larger than those of marijuana use. This study is the first to investigate the impact of medical marijuana laws (MMLs) on tobacco cigarette consumption. First, using data from the National Survey of Drug Use and Health (NSDUH), we establish that MMLs induce a 2 to 3 percentage point increase in adult marijuana consumption, likely for both recreational and medicinal purposes. Then, using data from the NSDUH, the Behavioral Risk Factor Surveillance System (BRFSS), and the Current Population Survey Tobacco Use Supplements (CPS-TUS), we find that the enactment of MMLs leads to a 1 to 1.5 percentage point reduction in adult cigarette smoking. We also find that MMLs reduce the number of cigarettes consumed by smokers, suggesting effects on both the cessation and intensive margins of cigarette use. Our estimated effect sizes imply substantial MML-induced tobacco-related health-care cost savings, ranging from $4.6 to $6.9 billion per year.

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烟进入您的眼睛：医用大麻法和吸烟习惯

据记录，烟草消费的公共卫生成本大大高于大麻消费的公共卫生成本。这项研究是首次调查医用大麻法（MMLs）对烟草卷烟消费的影响。首先，我们使用美国国家药物滥用与健康调查（NSDUH）的数据，我们确定MML会导致成人大麻消费量增加2至3个百分点，这可能是出于娱乐目的和医学目的。然后，使用来自NSDUH，行为危险因素监视系统（BRFSS）和当前人口调查烟草使用补充剂（CPS-TUS）的数据，我们发现MMLs的颁布导致成年人减少1至1.5个百分点吸烟。我们还发现，MML减少了吸烟者消费的香烟数量，暗示对戒烟和密集吸烟的影响。我们估计的影响规模意味着，MML诱导的与烟草相关的医疗保健成本节省很多，每年节省4.6到69亿美元。