The virus that triggered a localized shock in China is now delivering a significant global shock. This study simulates the potential impact of COVID-19 on gross domestic product and trade, using a standard global computable general equilibrium model. It models the shock as underutilization of...

We use anonymized and aggregated data from Facebook to show that areas with stronger social ties to two early COVID-19 “hotspots” (Westchester County, NY, in the U.S. and Lodi province in Italy) generally have more confirmed COVID-19 cases as of March 30, 2020. These relationships hold after...

This report and its accompanying interactive map show the vulnerability of every U.S. neighborhood to the economic impact of the COVID-19 crisis. Using data from the American Community Survey, they show that:• High-Poverty Communities Are the Most Economically Vulnerable. About 78 percent of...

This paper studies the spread of the Black Death as a proxy for the flow of medieval trade between 1346 and 1351. The Black Death struck most areas of Europe and the wider Mediterranean. Based on a modified version of the gravity model, we estimate the speed (in kilometers per day) of...