Sean Reardon is the endowed Professor of Poverty and Inequality in Education and 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 applied statistical methods for educational research. Professor Reardon developed the Stanford Education Data Archive (SEDA). Based on 300 million standardized test scores, SEDA provides measures of educational opportunity, average test score performance, academic achievement gaps, and other information for every public school district in the United States. Dr. Reardon received his Ph.D. in education from Harvard University. He is a member of the National Academy of Education and the American Academy of Arts and Sciences. He is also a recipient of the William T. Grant Foundation Scholar Award, the National Academy of Education Postdoctoral Fellowship, and an Andrew Carnegie Fellowship.