Joel A. Tarr is the Richard S. Caliguiri Professor of Urban and Environmental History and Policy at Carnegie Mellon University. He received his BS and MA degrees at Rutgers University and his PhD from Northwestern University. Among his many publications is the co-edited collection, Technology and the Rise of the Networked City in Europe and America, 1988 winner of the Abel Wolman Award from the Public Works Historical Society. He has been awarded fellowships and grants from several institutions, including the National Science Foundation and the National Endowment for the Humanities.