The effect of coverage of smoking‐cessation aids on tobacco use: Evidence from Canada
利用2008-2012年加拿大烟草使用监测调查和双重差分法，发现戒烟辅助工具覆盖反而增加了卷烟和小雪茄的使用，尤其在男性和大学及以上学历人群中更明显。
In clinical trials, smoking-cessation aids (SCAs) have proven to be effective at improving the odds of smoking cessation. Because of the effectiveness of SCAs in these settings, many countries have adopted the coverage of SCAs to reduce tobacco use. However, the effect of such coverage on tobacco use is ambiguous. On one hand, the coverage may have the intended effect and reduce tobacco use. On the other hand, the coverage may cause beneficiaries to participate in tobacco use more as the drug coverage protects beneficiaries from future costs associated with tobacco use. To understand the effect of SCA coverage, we examine it using 2008-2012 Canadian Tobacco Use Monitoring Survey and a difference-in-differences approach. We find that SCA coverage increases cigarette and cigarillo use. Moreover, the effect of SCA coverage on tobacco use is stronger in men and in those with at least a college education. Our results point to the unintended consequences of the coverage of SCAs on tobacco use.