Mark R. Rosenzweig is the Frank Altschul Professor of International Economics at Yale University. He is one of the principal investigators for the New Immigrant Survey and has testified before Congress on the topic of immigration. In addition to numerous articles and book chapters, he is the co-author of “The Chosen People: Immigrants in the United States” (with G. Jasso) and co-editor of “Handbook of Population and Family Economics” (with O. Stark) and “Contractual Arrangements: Employment Wages in Rural Labor Markets” (with H.P. Binswanger). Rosenzweig earned B.A., M.A. and Ph.D. degrees from Columbia University in 1969, 1971 and 1973, respectively, and studied at the London School of Economics 1968-1969. He was a junior faculty member at Yale 1973-1979 before becoming director of research for the Select Commission on Immigration and Refugee Policy in Washington, D.C. (1979-1980). Before returning to Yale, he taught at the University of Minnesota, where he was co-director of the Economic Development Center; the University of Pennsylvania, where he chaired the economics department; and Harvard University, where he held the Mohamed Kamal Professorship in Public Policy at the Kennedy School and was director of the Center for International Development. A fellow of the Econometric Society, Rosenzweig has served on several National Academy of Science panels studying the affect of human populations on the global environment. He received a National Institutes of Health Research Service Award and a Woodrow Wilson Dissertation Fellowship, among other honors. He has held visiting posts at several universities, including the Wei Lun Visiting Professorship at the Chinese University of Hong Kong. Currently editor of the Journal of Development Economics, Rosenzweig has served on the editorial boards of such publications as the World Bank Economic Review and the Journal of Economic Literature.