DEMETRIOS G. PAPADEMETRIOU is Director, Immigration Policy and Research, Bureau of International Affairs, U.S. Department of Labor, Washington, D.C. His previously published books include The Unavoidable Issue: U.S. Immigration Policy in the 1980s, Exploration into the Social and Labor Market Incorporation of Undocumented Aliens in the New York Areaand The Effects of Immigration on the U.S. Economy and Labor Market. He has contributed over fifty articles and book chapters to such publications as Environment and Planning, Comparative Politics, International Migration, Comparative Political Studies, and International Social Science Journal.PHILIP L. MARTIN is Professor, Department of Agricultural Economics, University of California, Davis. He specializes in labor market analysis and immigration.