Dr. Lisa Berkman, Faculty Chair of the Center for Population and Development Studies, is a social epidemiologist whose work focuses extensively on psychosocial influences on health outcomes. Her research has been oriented towards understanding social inequalities in health related to socioeconomic status, different racial and ethnic groups, and social networks, support and social isolation. The majority of her work is devoted to identifying the role of social networks and support in predicting declines in physical and cognitive functioning, onset of disease and mortality, especially related to cardiovascular or cerebrovascular disease.

David Bloom, Ph.D., is an economist and demographer and the Clarence James Gamble Professor at the Harvard School of Public Health. In January 2003 he was appointed Chairman of the School's Department of Population and International Health. Professor Bloom received a B.S. in Industrial and Labor Relations from Cornell University in 1976, an M.A. in Economics from Princeton University in 1978, and a Ph.D. in Economics and Demography from Princeton in 1981. Prior to joining the public health school faculty in 1996, Bloom served on the public policy faculty at Carnegie-Mellon University, and on the economics faculties at Harvard University and Columbia University. At Columbia, he was a Professor of Economics and the Department Chairman from 1990 to 1993. From 1996 to 1999 he served as Deputy Director of the Harvard Institute for International Development. Professor Bloom has worked extensively in the areas of labor, population, and health and has been retained as a consultant to various public and private organizations, both within the United States and throughout the developing world, including work in Indonesia, China, India, Sri Lanka, Pakistan, South Africa, Jamaica, and El Salvador. He has taught numerous courses on labor economics, development economics, global health and population, and statistics and econometrics at both the graduate and undergraduate levels, and has published more than one hundred fifty articles, book chapters, and books.

Edward Green, Ph.D., is Senior Research Scientist and Director of the AIDS Prevention Research Project, based at the Center. He is a medical anthropologist with over 30 years of experience in developing countries in applied research, project design, implementation, and evaluation, as well as in social marketing and behavior change & communication (BCC) health education. Prior to joining the Center, he was Takemi Fellow at the Department of Population and International Health, Harvard School of Public Health. His sectoral experience includes AIDS and sexually transmitted diseases, family planning, primary health care, maternal and child health, children affected by war, water and sanitation. Dr. Green is a specialist in integrating traditional (indigenous) and "modern" health systems, and has pioneered a number of collaborative programs in AIDS prevention and primary health care involving African healers. His 2003 book, Rethinking AIDS Prevention, has helped shape current US AIDS prevention policy, as embodied in the ABC policies of USAID and PEPFAR. He is a member of the Presidential Advisory Council on HIV and AIDS, (PACHA); a recent member of the Advisory Council of the Office of AIDS Research, Department of Health and Human Services; the board of AIDS.org; the board of the National Foundation for Alternative Medicine; and several other boards of directors. Dr. Green is the author of five books, over 300 peer-reviewed journal articles, book chapters, conference papers, and commissioned technical reports. 

Sofia Gruskin, J.D., M.I.A., is Director of the Program on International Health and Human Rights, and Associate Professor on Health and Human Rights in the Department of Population and International Health at the Harvard School of Public Health. She also serves as faculty chair for The Group on Reproductive Health and Rights at the Harvard Center for Population and Development Studies  Her work emphasizes the conceptual, methodological, policy and practice implications of linking health to human rights, with particular attention to women, children, gender issues, and vulnerable populations. She has extensive experience in research, training and programmatic work with nongovernmental, governmental and intergovernmental organizations working in the fields of health and human rights around the world. Professor Gruskin is the principal investigator for several UNAIDS, WHO and UNFPA sponsored projects intended to strengthen the health and human rights research and policy agenda-particularly in the areas of HIV/AIDS, sexual and reproductive health, child and adolescent health and gender-based violence. She serves on numerous boards and committees nationally and internationally, and is a permanent member of the NIH Behavioral and Social Consequences of HIV/AIDS study section. 

Daniel Halperin, Ph.D., joined the Harvard University Center for Population and Development Studies in October 2006. Until then Dr. Halperin served for two years as the Prevention and Behavior Change Technical Advisor for USAID's Southern Africa Regional HIV/AIDS Program (based out of Mbabane, Swaziland). Prior to that, he was the Senior HIV Prevention and Behavior Change Advisor at USAID in Washington DC. Dr. Halperin has conducted epidemiological and ethnographic research for over thirty years on a number of health and sociocultural issues in Latin America, sub-Saharan Africa and other developing regions. Since completing doctoral training in cultural/medical anthropology and Latin American Studies at the University of California, Berkeley in 1995, his work has mainly focused on the heterosexual transmission of HIV and other sexually transmitted infections, beginning with a three-year NIH postdoctoral fellowship at Berkeley's School of Public Health from 1995-8. Until joining USAID in August 2001, Dr. Halperin conducted research and managed HIV program activities as Assistant Professor at the University of California, San Francisco's Center for AIDS Prevention Studies (CAPS). One of the main research questions driving Dr. Halperin's HIV-AIDS investigations has been, "Why does HIV prevalence continue to be so low in many developing regions having high rates of other sexually transmitted infections, as well as other ‘classic' behavioral risk factors for an AIDS epidemic, and meanwhile HIV has reached such terribly high levels in regions like southern Africa?" Most of his research and scientific publications (including in leading journals such as The Lancet, British Medical Journal, AIDS, etc.) have therefore dealt with some of the previously more neglected HIV co-factors, such as concurrent sexual partner networks, lack of male circumcision, "dry sex" practices, alcohol use, and heterosexual anal intercourse. He has conducted field research and consultations over the years in a number of countries, including Brazil, South Africa, Botswana, Zimbabwe, the Dominican Republic, Peru and in various inner-city US communities, and has an extensive background working with at-risk youth, particularly socially disadvantaged young men. He is fluent in Portuguese and Spanish, and conversant in some other languages, including Thai and Japanese.

Allan G. Hill, Andelot Professor of Demography, Harvard School of Public Health and Harvard Center for Population and Development Studies. Professor Allan G. Hill has been the Andelot Professor of Demography at Harvard University since 1991. He directs the Education Office of the Department of Population and International Health in the Harvard School of Public Health and teaches courses there on demography, measuring population health, reproduction and reproductive health and on the assessment of the impact of health programs. His work focuses on the health transitions and their determinants in the Arab world and West Africa. Research in Mali and The Gambia included studies of the impact of selected health interventions and of the factors supporting high fertility. He recently directed the Women's Health Study of Accra whilst on leave at the University of Ghana 2002-4. He served as the Secretary-General of the International Union for the Scientific Study of Population for eight years. He has served on the faculty of the School of Health Sciences, the American University of Beirut and the Medical School, University of Jordan, the Ghana School of Public Health and collaborates with the Social Research Center, American University in Cairo. In addition to his university career, Dr. Hill was for four years the first regional representative for the Population Council in the Middle East and North Africa based in Beirut and Amman.

Kenneth Hill is Associate Director, Center for Population and Development Studies, Visiting Professor of Population and International Health at the Harvard School of Public Health, and Professor at the Johns Hopkins Bloomberg School of Public Health. A demographer, Dr. Hill's research interests span a wide range of areas, including the development of new demographic measurement methods (especially for outcomes that prove difficult to measure, like mortality among adults and children, the need for family planning, or migration lacking documentation); the measurement of child mortality; the exploration of connections between economic crises and demographic parameters; policy impacts on demographic change; the effects of gender preferences on child health behaviors and fertility; the role of development on fertility decline (especially child mortality change); the demography of Sub-Saharan Africa; and the measurement of demographic parameters during public health crises and complex emergencies.

Michael R. Reich is Taro Takemi Professor of International Health Policy and Director of the Takemi Program in International Health at the Harvard School of Public Health. He served as Center Director from 2001 to 2005 and before that was Chair of the Department of Population and International Health at HSPH. He received his Ph.D. in political science (1981), MA in East Asian Studies (1975), and BA in molecular biophysics and biochemistry (1974), all from Yale University. Dr. Reich has written about various aspects of international health policy, particularly the political dimensions of public health policy and pharmaceutical policy. His current research activities focus on access to health technologies in poor countries. He has provided policy advice for many organizations around the world, including national governments, international agencies, non-governmental organizations, private foundations, private corporations, and public-private partnerships. His recent books include: Public-Private Partnerships for Public Health (editor, distributed by Harvard University Press, 2002); Getting Health Reform Right (with M.J. Roberts, W. Hsiao, and P. Berman, Oxford University Press, 2004); Wounds of War (with J.M. Lamb, and M. Levy, distributed by Harvard University Press, 2004); and Access: How Do Good Health Technologies Get to Poor People in Poor Countries (with L. Frost, forthcoming).