Stefano Bertozzi is Professor and Dean of the School of Public Health at the University of California at Berkeley. He has led impact evaluations of large, national health and social programs in Mexico as well as in Africa, Asia and Latin America. His research has covered a diverse range of projects in health economics and policy, focusing on the economic aspects of HIV/AIDS and on the health impact of large social programs. Bertozzi was previously the director of the HIV Global Health Program at the Bill and Melinda Gates Foundation. He holds a Ph.D. in health policy and management from the Massachusetts Institute of Technology and earned his medical degree at UC San Diego.