Business Restrictions and COVID-19 Fatalities
研究了2020年3月至12月美国各县商业限制措施对COVID-19死亡人数增长的影响，发现员工口罩政策、口罩令、餐馆酒吧关闭等能降低死亡增长，而部分低风险商业关闭效果不明显甚至适得其反。
Abstract We collect a time-series database of business and related restrictions for every county in the United States from March through December 2020. We find strong evidence consistent with the idea that employee mask policies, mask mandates for the general population, restaurant and bar closures, gym closures, and high-risk business closures reduce future fatality growth. Other business restrictions, such as second-round closures of low- to medium-risk businesses and personal care/spa services, did not generate consistent evidence of lowered fatality growth and may have been counterproductive.