The research that led to this book began in the economics department at the University of Chicago. Contributors include: Timothy J. Bartik,Vanderbuilt University; Bruce Bender, University of Wis.-Milwaukee; Michael K. Duffy, Systems Research & Applications Corp.; Ronald J. Krumm, University of Chicago; William B. Shear, U.S. General Accounting Office; and George S. Tolley, University of Chicago.