Sean Reardon is the endowed Professor of Poverty and Inequality in Education and is Professor (by courtesy) of Sociology at Stanford University. His research focuses on the causes, patterns, trends, and consequences of social and educational inequality, the effects of educational policy on educational and social inequality, and in applied statistical methods for educational research. In addition, he develops methods of measuring social and educational inequality (including the measurement of segregation and achievement gaps) and methods of causal inference in educational and social science research. He teaches graduate courses in applied statistical methods, with a particular emphasis on the application of experimental and quasi-experimental methods to the investigation of issues of educational policy and practice. Sean received his doctorate in education in 1997 from Harvard University. He is a member of the National Academy of Education, and has been a recipient of a William T. Grant Foundation Scholar Award, a Carnegie Scholar Award, and a National Academy of Education Postdoctoral Fellowship.