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The Roles of Mobility and Masks in the Spread of COVID-19
This policy brief analyzes the effects of COVID-19 mitigation policies, those that restrict movement and activity and those that advocate public health best practices. The analysis uses US state-level data to estimate the effects of mobility, mask mandates, and compliance with these mandates on the numbers of COVID-19 cases and deaths. A one-standard-deviation increase in mobility is associated with an 11 to 20 basis points greater rate of growth in case counts; a mask mandate can offset about half of this increase. Slower growth in case counts ultimately translates into slower growth in ...