Sean Reardon is associate professor of Education at Stanford University. His research focuses on the causes and consequences of social and educational inequality. In particular, he studies the causes and consequences of residential and school segregation and the sources of racial/ethnic achievement gaps. In addition, he is interested in methods of measurement and causal inference in educational and social science research. Dr. Reardon received an Ed.D. and a M.Ed. in educational administration, planning, and social policy from the Harvard Graduate School of Education in 1997 and 1992 respectively; a M.A. in international peace studies from the University of Notre Dame in 1991; and a B.A. in liberal studies from the University of Notre Dame in 1986.