1. CNRS—Institut Jean Nicod, 29 rue d'Ulm, 75005 Paris, France; University of Michigan, Ann Arbor, MI; and John Jay College of Criminal Justice, New York, NY, USA
2. University of Michigan, Ann Arbor, MI 48109, USA
3. RTI International, 3040 Cornwallis Road, Research Triangle Park, NC 27709, and ARTIS Research and Risk Modeling, Washington, DC, USA