BRIAN DUNCAN is assistant professor of economics at the University of Colorado at Denver. He also taught economics at the University of California at Santa Barbara. His research focuses on public finance, labor, and econometrics. He has served as a referee for the Journal of Public Health and Economic Inquiry and in 2001 was awarded the Lancaster prize in social sciences. He has authored numerous published articles, including Modeling Charitable Contributions of Time and Money (1999) and Pumpkin Pies and Public Goods: The Raffle Fundraising Strategy (2002). He has a Ph.D. in economics from the University of California, Santa Barbara.
JORGE DURAND is professor of anthropology at the University of Guadalajara, México, and codirector of the Mexican Migration Project and the Latin American Migration Project sponsored by Princeton University and the University of Guadalajara. He is a member of the Mexican Academy of Sciences and a foreign associate of the National Academy of Sciences. He has studied and written about Mexican migration to the United States for the past 20 years. His publications in this field include Return to Aztlán (1987), Más allá de la línea (1984), Miracles on the Border (1995), Migrations Mexicaines aux Etats-Unis (1995), La experiencia migrante (2000), Beyond Smoke and Mirrors (2002), and Clandestinos: Migración mexicana en los albores del siglo XXI (2003).
JOSÉ J. ESCARCE is professor of medicine at the David Geffen School of Medicine at the University of California, Los Angeles and senior natural scientist at the RAND Corporation. His research interests include racial and ethnic disparities in health and health care, immigrant health, provider and patient behavior under economic incentives, technological change in medicine, and the impact of health care market structure on costs and quality. He has served on the National Advisory Council for Health Care Policy, Research, and Evaluation of the U.S. Department of Health and Human Services; was a member of the Institute of Medicine’s Committee on Understanding and Eliminating Racial and Ethnic Disparities in Health Care; and is senior associate editor of the journal Health Services Research. He serves on the board of education of the public school district in Santa Monica, California, a small urban district where one-third of the students are Hispanic. He is a graduate of Princeton University and has an M.S. in physics from Harvard University and M.D. and Ph.D. degrees, the latter in health economics, from the University of Pennsylvania.
MARY J. FISCHER is assistant professor of sociology at the University of Connecticut. Previously she served as the project manager for the National Longitudinal Survey of Freshmen at Princeton University and the University of Pennsylvania. She is a coauthor of The Source of the River (2004) and