Does social distancing harm innovation? We estimate the effect of non-pharmaceutical interventions (NPIs)--policies that restrict interactions in an attempt to slow the spread of disease--on local invention. We construct a panel of issued patents and NPIs adopted by 50 large US cities during the...

We examine portage sites in the U.S. South, Mid-Atlantic, and Midwest, including those on the fall line, a geomorphologic feature in the southeastern U.S. marking the final rapids on rivers before the ocean. Historically, waterborne transport of goods required portage around the falls at these...