Sissela Bok, Senior Visiting Fellow, a writer and philosopher, received her B.A. and M.A. in psychology at the George Washington University in 1957 and 1958, and her Ph.D. in philosophy at Harvard University in 1970. She was formerly a Professor of Philosophy at Brandeis University. The third edition of her book Lying: Moral Choice in Private and Public Life (1978) was reissued in 1999 with a new preface. Other books include Secrets: On the Ethics of Concealment and Revelation (1982, 1989); A Strategy for Peace: Human Values and the Threat of War (1989); Alva Myrdal: A Daughter's Memoir (1991); Common Values (1996, reissued in 2002 with a new preface); and Mayhem: Violence as Public Entertainment (1998). With John Behnke, Bok has co-edited The Dilemmas of Euthanasia (1975) and, with Daniel Callahan, Ethics Teaching in Higher Education (1980). With Gerald Dworkin and R. G. Frey, she has co-authored Euthanasia and Physician-Assisted Suicide (1998).

Rose E. Frisch, Associate Professor of Population Sciences, Emeritus, at the Department of Population and International Health, Harvard School of Public Health. Dr. Frisch obtained her Ph.D. in Genetics from the University of Wisconsin. She is Fellow of the American Academy of Arts and Sciences and the John S. Memorial Guggenheim Foundation, and former Sigma Xi National Lecturer from 1989-1990. Her research has shown that under-nutrition and intense physical activity can have a limiting effect on female fertility. She hypothesized that a critical, minimum amount of body fat is necessary for, and directly influences, female reproduction. Her research results are predictive and are now used clinically for evaluation of nutritional infertility and the restoration of fertility. Research on the long-term health of 5,498 U.S. college alumnae showed that moderate regular athletic activity resulted in a lower risk of breast cancer and cancers of the reproductive system and a lower risk of late onset diabetes in the menopausal years. She has shown how environmental factors of nutrition, physical activity and disease can affect each reproductive milestone from menarche to menopause. Leptin, a new protein hormone made by body fat, is a major signal to the hypothalamus. She has published numerous articles, and several books. The most recent, Female Fertility and the Body Fat Connection, University of Chicago Press, 2002, paperback 2004, covers her 35 years of research on the topic.

Michael J. Levin is currently a Mid-Career MPA Student at the Kennedy School. His Ph.D. in Anthropology from Michigan looked at the effects of population pressure on scarce resources on a 26 acre atoll in Micronesia. He worked for 8 years in the East-West Center's Population Program and followed with 27 years at the U.S. Census Bureau. He has worked in most of the Pacific Islands countries and territories and a dozen African countries, mostly assisting statistical offices in collecting, processing, and analyzing census and survey data. He has published many articles and several books, including the UN Editing Handbook, Alaska Natives in a Century of Change, and the co-authored Asians and Pacific Islanders in the United States. At HCPDS, he is helping coordinate the revived census and survey training program.

George Zeidenstein, is a Visiting Distinguished Fellow at the Center, where he has been teaching and mentoring graduate students since 1993. Before that, he was President and a Trustee of the Population Council for seventeen years. Earlier, Zeidenstein worked on a wide spectrum of international development issues with the Ford Foundation and the Peace Corps, including several years of residence with his wife and their two children in Nepal as Country Director of the Peace Corps and in Bangladesh as Resident Representative of the Ford Foundation. Zeidenstein has been decorated by the governments of Finland and Senegal for his international development work. He is author of a published memoir of his early life entitled, Lifelines. During his first ten years of professional life, Zeidenstein practiced corporate and securities law in New York City.