Christopher Winship is the Diker-Tishman Professor of Sociology, Harvard University and a member of the senior faculty at the Harvard Kennedy School of Government. He is a faculty associate of the Institute for Quantitative Social Science, the Program in Criminal Justice, the Ph.D. Program in Organizational Behavior, the Center for Public Leadership, the Safra Center for Ethics, and the Program in Social Inequality. He is past chair of both the Departments of Sociology at Harvard and Northwestern University. Prior to coming to Harvard in 1992, he was a Professor of Sociology, Statistics, and Economics at Northwestern. He has also been the Director of the Program in Mathematical Methods in the Social Sciences at Northwestern and interim Director of the Economic Research Center at the University of Chicago. He has a BA in Sociology and Mathematics from Dartmouth College (1972) and a Ph.D. in Sociology from Harvard University (1977). Along with Robert Sampson he is the founder of the Boston Area Research Initiative, an interuniversity research collaborative whose goal is to bring high quality research to local government decision making.