1. Departments of Psychology and Economics, University of British Columbia, 2136 West Mall, Vancouver, British Columbia V6T 1Z4, Canada.
2. Division of the Humanities and Social Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
3. Department of Anthropology, University of California, Davis, CA 95616, USA.
4. Centre for the Study of African Economies, Department of Economics, University of Oxford, Manor Road, Oxford OX1 3UQ, UK.
5. Department of Anthropology, University of California, 341 Haines Hall, Box 951553, Los Angeles, CA 90095, USA.
6. Department of Anthropology, College of DuPage, Glen Ellyn, IL 60137, USA.
7. Facultad de Economia, Universidad de Los Andes, K1 Number 18A-70, Bogotá, Colombia.
8. Department of Anthropology, University of California, Santa Barbara, CA 93106, USA.
9. Department of Sociology and Anthropology, Guilford College, 5800 West Friendly Avenue, Greensboro, NC 27410, USA.
10. Centre for Health Evaluation and Outcome Sciences, Providence Health Care Research Institute, Vancouver, British Columbia V6Z 1Y6, Canada.
11. George Warren Brown School of Social Work, Washington University, 1 Brookings Drive, St. Louis, MO 63130, USA.
12. Department of Anthropology, Florida State University, Tallahassee, FL 32306, USA.
13. Department of Anthropology, University of Colorado, Post Office Box 173364, Campus Box 103, Denver, CO 80217, USA.
14. Department of Anthropology, Boise State University, 1910 University Drive, Boise, ID 83725, USA.