Daniel S. Nagin is Teresa and H. John Heinz III University Professor of Public Policy and Statistics in the Heinz College at Carnegie Mellon University. He is an elected Fellow of the American Society of Criminology, and the American Society for the Advancement of Science. He was awarded the American Society of Criminology’s Edwin H. Sutherland Award in 2006 and the Stockholm Prize in Criminology in 2014. His research focuses on the evolution of criminal and antisocial behaviors over the life course, the deterrent effect of criminal and noncriminal penalties on illegal behaviors, and the development of statistical methods for analyzing longitudinal data. His work has appeared in such diverse outlets as the American Economic Review, American Sociological Review, theJournal of the American Statistical Association, American Journal of Sociology,Archives of General Psychiatry, Criminology, Child Development, Demography,Psychological Methodology, Law & Society Review, Crime and Justice Annual Review, Operations Research, and the Stanford Law Review. He is also the author of Group-based Modeling of Development (Harvard University Press 2005) and chaired and coedited the report of the (U.S.) National Academy of Sciences’ Committee on Deterrence and the Death Penalty.