1. McCauley Chair in Drug Policy Innovation and Director of the RAND Drug Policy Research Center, RAND, Santa Monica, CA, USA
2. RAND Drug Policy Research Center, RAND, Arlington, VA, USA
3. H. Guyford Stever University Professor of Operations Research and Public Policy, Carnegie Mellon University’s Heinz College, Pittsburgh, PA, USA
4. School of Public Policy and the Department of Criminology, University of Maryland, College Park, MD, USA