Michael Clemens is a senior fellow at the Center for Global Development where he leads the Migration and Development initiative. His current research focuses on the effects of international migration on people from and in developing countries. Michael joined the Center after completing his PhD in Economics at Harvard, where his fields were economic development and public finance, and he wrote his dissertation in economic history. His past writings have focused on the effects of foreign aid, determinants of capital flows and the effects of tariff policy in the 19th century and the historical determinants of school system expansion. Michael has served as an Affiliated Associate Professor of Public Policy at Georgetown University, and as a consultant for the World Bank, Bain & Co., the Environmental Defense Fund, and the United Nations Development Program. He has lived and worked in Brazil, Colombia, and Turkey.