Patrick J. McEwan is Assistant Professor in the Department of Economics at Wellesley College in Wellesley, Massachusetts, and an affiliate of the David Rockefeller Center for Latin American Studies at Harvard University. Previously, he taught in the Department of Educational Policy Studies at the University of Illinois at Urbana-Champaign and served as Assistant Director of Research at the National Center for the Study of Privatization in Education at Teachers College, Columbia University. He completed his PhD in education at Stanford University, in addition to master's degrees in economics and international development. His published books (with Henry Levin) include Cost-Effectiveness Analysis: Methods and Applications, Second Edition (2001) and Cost-Effectiveness and Educational Policy: 2002 Yearbook of the American Education Finance Association (2002). He is the author of numerous journal articles, book chapters, and reports, and he has consulted on education policy and evaluation at the Inter-American Development Bank, RAND, UNESCO, and the ministries of education of several countries. His recent research (with Martin Carnoy) has evaluated the impact of Chile's national voucher plan on the effectiveness and efficiency of primary education.