Using data from the US Postal Service and Zillow, we quantify the effect of Covid-19 on migration patterns and real estate markets within and across US cities. We find two key results. First, within large US cities, households, businesses, and real estate demand have moved from dense central...

This paper revisits the results of Bloom, Schankerman, and Van Reenen (2013) examining the impact of R&D on the performance of US firms, especially through spillovers. We extend their analysis to include an additional 15 years of data through 2015, and update the measures of firms' interactions...