We study optimal transport networks in spatial equilibrium. We develop a framework consisting of a neoclassical trade model with labor mobility in which locations are arranged on a graph. Goods must be shipped through linked locations, and transport costs depend on congestion and on the...

The current 2007-2010 recession has witnessed two phenomena that standard search models of the labor market have diculty reconciling: a large and persistent increase in unemployment and a sharp rise, above pre-recession levels, in labor productivity following a small initial drop. In addition,...

We study optimal dynamic lockdowns against Covid-19 within a commuting network. Our framework integrates canonical spatial epidemiology and trade models, and is applied to cities with varying initial viral spread: Seoul, Daegu and NYC-Metro. Spatial lockdowns achieve substantially smaller income...