The effect of face masks on Covid-19 transmission is crucial for the health of populations. The effectiveness of face masks in reducing the transmission of Covid-19 varies across primary evidence. To perform a quantitative meta-analysis, we collected 258 estimates from 44 primary studies...

Even when — objectively speaking — death is on the line, partisan bias still colors beliefs about facts. We use data on internet searches as well as proprietary data on county-level average daily travel distance and visits to non-essential businesses from a large sample of U.S. smartphones...

We examine how policymakers react to a pandemic with uncertainty regarding key epidemiological parameters by embedding a macroeconomic SIR model in a robust control framework. We find that optimal policy under uncertainty generates optimal mitigation responses that are asymmetric with respect to...