Philip J. Cook is ITT/Sanford Professor of Public Policy and Professor of Economics and Sociology at Duke University; author of Paying the Tab: The Costs and Benefits of Alcohol Control, (Princeton University Press, 2007), Gun Violence: The Real Costs (Oxford University Press, 2000), Evaluating Gun Policy (Brookings Institution Press, 2003), with Charles Clotfelter Selling Hope: State Lotteries in America, (Harvard University Press, 1989), and with Robert H. Frank The Winner-Take-All Society, (The Free Press, 1995). Kristin A Goss is Associate Professor of Public Policy and Political Science at Duke University; author of Disarmed: The Missing Movement for Gun Control in America (Princeton University Press, 2006, 2009), and The Paradox of Gender Equality: How American Women's Groups Gained and Lost Their Public Voice (forthcoming from the University of Michigan Press)