data in both HRS and AHEAD and racial and ethnic differences in personal net worth, Social Security, and pension wealth. Dr. Smith is also a member of the National Science Foundation Advisory Committee for the Panel Study of Income Dynamics and is the public representative appointed by the governor of California on the state board for the Occupational Safety and Health Administration. He has served on the National Advisory Board for the Poverty Institute and on the Population Research Committee at the National Institutes of Health. He has received the National Institutes of Health MERIT Award. He has a Ph.D. in economics from the University of Chicago.

EUGENIA WANG is professor of biochemistry and molecular biology in the School of Medicine at the University of Louisville. Previously, she was professor of anatomy and cell biology and of neurology and neurosurgery at McGill University in Montréal, where she was also director of the Bloomfield Center for Research in Aging at the Lady Davis Institute for Medical Research. Dr. Wang has investigated the molecular mechanisms controlling the process of aging, at both cellular and organismic levels. Her recent work involves the investigation of gene-directed programs regulating the ontogeny of age-dependent diseases, and how genetic action in individual cells controls human longevity, integrating microarray technology, mathematical genomics, and pattern recognition theory to identify genetic and epigenetic factors as life-span determinants. She is chair of the biological science section of the Gerontological Society of America and has served as chair of the biological science section of the Canadian Association on Gerontology. She was also a member of the Minority Aging Ad Hoc Review Committee for the National Advisory Council on Aging. Dr. Wang received her B.S. from the National Taiwan University, her M.Sc. from Northern Michigan University, and her Ph.D. from Case Western Reserve University.

DAVID R. WILLIAMS is professor of sociology and senior research scientist at the Institute for Social Research at the University of Michigan. His prior academic appointment was at Yale University. Dr. Williams is interested in social and psychological factors that affect health and especially in the trends and the determinants of socioeconomic and racial differences in mental and physical health. Currently, he is on the editorial board of five scientific journals. He also served on the Department of Health and Human Services National Committee on Vital and Health Statistics, chairing its subcommittee on minority and other special populations. He has held such elected positions in professional organizations as secretary-treasurer of the Medical Sociology Section of the American Sociological Association. He received an M.P.H. from Loma Linda University and a Ph.D. in sociology from the University of Michigan.



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