Philip J. Cook, Ph.D., is a Professor of Public Policy, Economics and Sociology at Duke University. He completed his PhD in Economics at the University of California, Berkeley, in 1973. He has extensive research interests in alcohol and tobacco control, crime prevention, firearms violence, education policy, and the causes and consequences of growing income inequality. He has served on a number of expert panels of the National Academy of Sciences, and serves as co-organizer of the NBER Workshop on the Economics of Crime. He has authored a number of books, including Paying the Tab (Princeton) and (with Robert H. Frank) The Winner-Take-All Society (The Free Press). Dr. Cook was elected to the Institute of Medicine (now the National Academy of Medicine) in 2001.