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.

中文翻译：

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业务限制和 COVID-19 死亡人数

我们收集了从 2020 年 3 月到 2020 年 12 月美国每个县的商业和相关限制的时间序列数据库。我们发现强有力的证据与以下观点一致：员工戴口罩政策、对普通人群的戴口罩规定、餐厅和酒吧关闭、健身房关闭和高风险企业关闭会降低未来的死亡率增长。其他业务限制，例如中低风险企业和个人护理/水疗服务的第二轮关闭，并没有产生死亡率增长降低的一致证据，并且可能适得其反。