Andrew M. Penner is Associate Professor of Sociology and Director of the Center for Administrative Data Analysis at the University of California, Irvine. His research addresses questions surrounding inequality, paying particular attention to how society creates categories and sorts people into them, and the consequences of these categorization processes. Substantively, his work focuses on racial categorization and inequality, international gender inequality, and how educational categories shape students’ longer term trajectories of well-being. He has extensive experience working with administrative records in the United States, Norway, the Czech Republic, and Slovenia, and together with Ken Dodge is editing the Russell Sage Foundation journal’s special issue on administrative data. His previous work has appeared in the top general science (Science, PNAS) and interdisciplinary journals (Demography, Journal of Marriage and Family), as well as a range of disciplinary journals (American Journal of Sociology, Journal of Educational Psychology, Industrial and Labor Relations Review), and been supported by the Russell Sage Foundation, the Spencer Foundation, the National Science Foundation, and NICHD.