Ed Glaeser is the Fred and Eleanor Glimp Professor of Economics at Harvard, where he also serves as Director of the Taubman Center for State and Local Government and the Rappaport Institute for Greater Boston. He studies the economics of cities, and has written scores of urban issues, including the growth of cities, segregation, crime, and housing markets. He has been particularly interested in the role that geographic proximity can play in creating knowledge and innovation. He received his Ph.D. from the University of Chicago in 1992 and has been at Harvard since then.