of the American Society of Criminology, and has been a research associate with the National Bureau of Economic Research since 1996. He has served on a total of five different expert panels and committees at the National Academies. He is author of several books, including: Gun Violence: The Real Costs with Jens Ludwig; The Winner-Take-All Society with Robert H. Frank; and Selling Hope: State Lotteries in America with Charles T. Clotfelter.

THOMAS A. DISHION is a research scientist and associate professor in the Department of Counseling Psychology at the University of Oregon. His research focus falls within the broad area of developmental psychopathology. He is interested in understanding how children’s social interactions with parents, peers and siblings influence stability and change in developmental trajectories. More recently he has studied the role of discourse topic in organizing the affective exchanges among children and their peers with respect to the development and escalation of antisocial behavior and drug use. He is also interested in applying knowledge of developmental processes to the design of preventive and clinical interventions that reduce conflict and distress in families. He is currently principal investigator of a prevention trial targeting multiethnic families in an urban setting, with the goal of promoting successful adaptation during the adolescent transition as well as reducing problem behavior such as violence and drug abuse. He co-authored the volume Antisocial Boys, and his most recent book for parents is Preventive Parenting with Love, Encouragement and Limits, co-authored with Scott Patterson.

DENISE C. GOTTFREDSON is a professor of criminal justice at the University of Maryland. She received a Ph.D. in social relations from the Johns Hopkins University, where she specialized in sociology of education. Dr. Gottfredson’s research interests include delinquency and delinquency prevention, and particularly the effects of school environments on youth behavior. She has contributed to the literature of school-based crime prevention by testing specific strategies and more recently by summarizing the literature. Her earlier evaluations include Project PATHE, an environmental approach to delinquency prevention; a three-year organization development intervention to reduce violence and related problem behaviors in two troubled Baltimore City junior high schools; and a three-year effort in eight Charleston, South Carolina, middle schools aimed at altering school and classroom environments to reduce student misbehavior. Her recent and current work includes a report to the U.S. Congress on what works, what doesn’t work, and what is promising in school-based crime prevention; a recent National Study of Delinquency Prevention in Schools; and a recent book on school-based delinquency prevention.



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