James Coleman was University Professor in Sociology at the University of Chicago, and director of its National Opinion Research Center. His work on educational opportunity - the Coleman Report of 1966 - and subsequent work on white flight and Catholic schooling were of considerable significance in policymaking. "His research has profoundly affected our understanding of social change and collective action theory and has widely influenced the course of education in America." - Robert Michael, Eliakim Hastings Moore Distinguished Service Professor at the University of Chicago. Robert Smith is presently researcher at the Cambridge-MIT Institute. His publications include theoretical and empirical analyses of political and social processes, statistical methods, and A Handbook of Social Science Methods.