State Advisory Committee for Alcohol and Substance Abuse. He is the codeveloper of the Social Development Model, a parenting program called Preparing for the Drug-Free Years, and the community prevention approach called Communities That Care.

DAVID S. CORDRAY is professor of public policy and psychology and director of the Center for the Study of At-Risk Populations and Public Assistance Policy at the Vanderbilt Institute for Public Policy Studies. Prior to joining the faculty at Vanderbilt, he was an associate professor in the Division of Methodology and Evaluation Research at Northwestern University and the assistant director of federal welfare and statistical policy in the Program and Evaluation Methodology Division of the U.S. General Accounting Office. He has served as president of the American Evaluation Association, a member of the National Academy of Public Administration's Panel on Performance Indicators in Government, and a member of the evaluation review panel for the U.S. Department of Education. He has published dozens of journal articles and books, including Secondary Analysis of Program Evaluations (as coeditor); Volume 11 of the Evaluation Studies Review Annual (as coeditor); Explanatory Meta-Analysis: A Casebook (with Tom Cook et al.); articles on meta-analytic strategies and the quality of research; and articles on methodological issues associated with counting the homeless population. His current research areas include alcohol and other drug abuse among homeless people, the effects of job training on welfare and work, and methods for improving the quality of intervention research. Cordray has a B.A. in psychology and an M.A. in social psychology from California State University and a Ph.D. in social-environmental psychology and applied research methodology from Claremont Graduate School, with postdoctoral training in the Division of Methodology and Evaluation Research of Northwestern University.

DON C. DES JARLAIS is director of research for the Chemical Dependency Institute at Beth Israel Medical Center; deputy director for AIDS Research with National Development and Research Institutes, Inc.; visiting professor of psychology at Columbia University; and professor of epidemiology at the Albert Einstein College of Medicine. A leader in the fields of AIDS and intravenous drug use over the last 15 years, he has published widely on these topics. He has served as consultant to various institutions, including the Centers for Disease Control and Prevention, the National Institute on Drug Abuse, and the World Health Organization. He has been a member of a number of committees of the National Research Council and the Institute of Medicine, including the Committee on AIDS Research and the Behavioral, Social and Statistical Sciences and the Panel on AIDS and IV-Drug Use. He was a member of the President's National Commission on



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