Jens Ludwig is the McCormick Foundation Professor of Social Service Administration, Law, and Public Policy and Director of the Crime Lab at the University of Chicago, Non-Resident Senior Fellow in Economic Studies at the Brookings Institution, Research Associate at the National Bureau of Economic Research (NBER), and co-director of the NBER’s Working Group on the Economics of Crime. Ludwig has been involved for the past dozen years with the evaluation of a large HUD-funded housing-mobility experiment known as Moving to Opportunity (MTO), which includes a major demonstration site on the south side of Chicago. He is also one of the nation’s leading gun policy researchers, whose publications on the topic include Gun Violence: The Real Costs with Philip Cook (Oxford, 2000) and Evaluating Gun Policy, co-edited with Cook (Brookings, 2003). In 2006 he was awarded the David Kershaw Prize by the Association for Public Policy Analysis and Management for distinguished contributions to public policy by the age of 40.