Can a smoking ban save your heart?
利用瑞士2007-2011年公共场所禁烟令的时空差异，发现该政策使急性心肌梗死发病率立即下降约8%，且地区间效果差异大，表明禁烟能有效减少吸烟的负外部性并可能影响健康不平等。
This paper evaluates the causal effect of environmental tobacco exposure on health by exploiting the time and geographical variation in public-place smoking bans implemented in Switzerland between 2007 and 2011. We use administrative data on hospitalizations for acute myocardial infarction, which allow to measure the short-run effects of the policy on an objective metric of health. We show that the incidence of acute myocardial infarction decreases by approximately 8% immediately after implementation of the law with large heterogeneity across regions. Our results indicate that the policy was effective in reducing the negative externality of smoking with potential spillovers on health inequality.