Thomas J. Holmes is the Curtis L. Carlson Professor of Economics at the University of Minnesota. He received his Ph.D. in economics from Northwestern in 1985. He joined the faculty of the University of Wisconsin in 1985, moved to the Federal Reserve Bank of Minneapolis in 1993, and then moved to the University of Minnesota in 1995. In 2014 he was the Sam B. Cook Visiting Professor at Washington University in St. Louis. He was elected a fellow of the Econometric Society in 2011 and is currently president of the Urban Economics Association. He is a consultant to the Federal Reserve Bank of Minneapolis and a Research Associate of the NBER. He has published extensively on topics in industrial organization and urban and regional economics. Recent work includes estimates of the economies of density achieved in the diffusion of Wal-Mart, and an analysis of how international trade has affected the size distribution and geographic distribution of manufacturing plants. For more information visit his website.