I am an assistant professor in the Department of Economics at the University of Michigan.  My interests are international trade, economic geography and economic growth.  
Contact Information
 Tel: (734) 717-1753
Office:  375 Lorch Hall


The role of trade costs in generating the spatial distribution of wages and employment across regions is a classic question in economic geography. This paper make several contributions to the extensive theoretical and empirical literature on this topic. First, I show that for a wide class of economic geography models the positive implications of changes in trade costs are captured by two reduced form elasticities: the elasticities of wages and employment with respect to market access. Second, I develop a novel instrumental variable approach to consistently estimate these elasticities from changes in observed wages and employment using exogenous changes in the incomes of each location's trading partners. I implement this approach using data on U.S. MSAs between 1990 and 2007 and find that wages and employment are quite sensitive to differences in market access across cities. Counterfactual simulations indicate that eliminating trade costs would result in large shifts in employment from the Northeast towards the West and a flattening of the city size and wage distributions. More modest reductions in trade costs lead to qualitatively similar outcomes that remain quantitatively significant.

    -VoxEU.org column

Specialization is a powerful source of productivity gains, but how production networks at the industry level are related to aggregate productivity in the data is an open question. We construct a database of input-output tables covering a broad spectrum of countries and times, develop a theoretical framework to derive an econometric specification, and document a strong and robust relationship between the strength of industry linkages and aggregate productivity. We then calibrate a multisector neoclassical model and use alternative identification assumptions to extract an industry-level measure of distortions in intermediate input choices. We compute the aggregate losses from these distortions for each country in our sample and find that they are quantitatively consistent with the relationship between industry linkages and aggregate productivity in the data. Our estimates imply that the TFP gains from eliminating these distortions are modest but significant, averaging roughly 10% for middle and low income countries

Econ 641 (International Trade), Fall 2015
Econ 441 (International Trade), Winter 2016