Henri Bergeron, PhD in Sociology is a senior Research Fellow at The French National Centre for Scientific Research. He is also the Scientific Coordinator of a Chair in Public Health Studies at Sciences Po Paris (Fondation Nationale des Sciences Politiques). He was for 4.5 years deputy scientific coordinator of the EMCDDA and he has conducted research on the forming, framing and implementation of Drug policies in Europe. Among his books are L’Etat et la toxicomanie. Histoire d’une singularité française and Sociologie de la Drogue (to be published in 2008). Sandeep Chawla, Ph.D., is head of Research and Policy Analysis at the United Nations Office on Drugs and Crime (UNODC). Since 1994 he has led the development of UNODC’s research and analysis capabilities. The systematic publication of research findings, analytical studies, statistics and annual estimates of the extent of illicit drug production, trafficking and abuse, reflected in the World Drug Report, the annual Global Illicit Drug Trends publications, the Studies on Drugs and Crime series and the annual illicit crop survey reports, all occurred during this period. He is the Editor of the United Nations Bulletin on Narcotics, which is one of the oldest journals in the field, having been in continuous publication since 1949. Christine Godfrey is a Professor of Health Economics at the Department of Health Sciences and Centre for Health Economics at the University of York, United Kingdom. She has been researching on the economics of alcohol, tobacco and illicit drugs since 1984. She is an applied researcher particularly interested in how economic techniques combined with research from other social scientists can be used to inform policy decisions. Keith Humphreys University and a Veterans Affairs. people who have consultant to drug the Middle East. is an Associate Professor of Psychiatry at Stanford Career Research Scientist in the U.S. Department of He has studied treatment and self-help programs for substance abuse problems for 20 years. He has been a policy makers in the U.S., U.K., Eastern Europe and in Peter Reuter is Professor in the School of Public Policy at the University of Maryland, where he also holds a joint appointment in the Department of Criminology. Trained as an economist, he has conducted research on drug markets and various aspects of drug policy for the past twenty years. Among his books is Drug War Heresies: Learning from other Vices, Times and Places (with Robert MacCoun)" Alison Ritter is Associate Professor at the National Drug and Alcohol Research Centre, Australia. After initially working as a Clinical Psychologist with drug and alcohol dependent people, she moved into clinical research and in the last few years has focussed on drug policy research.