Dr. David F. Duncan, who has been called "the Stephen Hawkings of public health", is President of Duncan & Associates, a firm providing consultation on research design and data collection for behavioral and policy studies. He is also Clinical Associate Professor of Medicine at Brown University, an Ivy League institution in Providence, Rhode Island, USA. His education included an undergraduate major in psychology, with minors in sociology and education, at the University of Missouri at Kansas City, and graduate work in criminology at Sam Houston State University in Texas. He earned the degree of Doctor of Public Health from the University of Texas at Houston with an interdisciplinary program in behavioral sciences, epidemiology, biostatistics, and program and policy evaluation. He later earned a postdoctoral diploma in alcoholism early intervention and treatment effectiveness research from Brown University. He was a consultant to President Clinton's White House Office of National Drug Control Policy during his tenure as Senior Study Director of the Substance Abuse Research Group of the Westat corporation. In this position he also provided consultation to the National Institute on Drug Abuse, Center for Substance Abuse Treatment, Center for Substance Abuse Prevention, National Academy of Science, New York City Housing Authority, and SPSS, Inc.. He served from 1996 to 1998 as Senior Public Health Epidemiologist in the Director's Office of the Rhode Island Department of Health where he was coordinator of health policy and Project Director of the state's Unified Needs Assessment Program for Substance Abuse Prevention and Treatment. Prof. Duncan's varied career has included positions in both juvenile and adult corrections and as deputy sheriff and a private detective. He has been director of a halfway house for drug abusers, a comprehensive drug abuse treatment center, and a private school for emotionally disturbed children. He served as a research associate to the working group on substance abuse treatment for the President's Task Force on National Health Care Reform chaired by First Lady Hillary Clinton in 1993. He has held academic positions as Associate Professor of Health Science at SUNY-Brockport, Professor of Health Education at Southern Illinois University, Professor of Biology at the Community College of Rhode island, and Professor of Health and Environmental Research at the University of Cologne in Germany. He has lectured at the University of Rochester, New York State School of Psychiatry, Columbia University's Teachers College and School of Public Health, University of Texas Medical Branch, University of Minnesota, Western Kentucky University, Fort Valley State University, New England Gerontology Academy, Trinity College (Dublin), Oxford University, German Academy of Public Health, University of Wurzburg, and Universidad Complutense de Madrid. He is a past chairman of the Mental Health Section of the American Public Health Association, and has served on A.P.H.A.'s committees on Program, Membership, and Continuing Education. He is a member of the American Psychological Association's Cadre of Experts on Violence. He is current chair of the Council on Illicit Drugs and Program Committee chair of the National Association for Public Health Policy. He was Vice Chair of the Board of Directors of the New England Gerontology Academy. He chairs the Advisory Committee for the M.P.H. Program at Fort Valley State University. He is a member of the Board of Governors of Butler Hospital, a psychiatric hospital in Providence, Rhode Island, and of the Board of Directors of the Bowling Green-Warren County Primary Care Center in Bowling Green, Kentucky.