John R. Logan is Professor of Sociology and Director of the initiative on Spatial Structures in the Social Sciences at Brown University. Founder of the Urban China Research Network, supported by the Andrew W. Mellon Foundation, Dr. Logan is also a member of the editorial boards of Journal of Urban Affairs and City and Community. He was chosen Distinguished Professor of Sociology at the University at Albany, SUNY, as well as Director of the Lewis Mumford Center for Comparative Urban and Regional Research. In April 2003 he was selected by American Demographics magazine as one of five social demographers whose work has most influenced his field in the last 25 years.