with particular focus on consumption and spending patterns, saving and asset accumulation, housing dynamics, and retirement and pension choices. Recent work has also begun to look at broader issues in the economics of aging such as health, physical and cognitive functioning and their association with labor market status; the dynamics of work disability; and the nature of expectations of retirement, health, and longevity. He is also coprincipal investigator of the English Longitudinal Study of Ageing and has become actively involved in designing economic measures for survey data. He holds a Ph.D. in economics from University College London.

Lisa F. Berkman is director, Harvard Center for Population and Development Studies and Thomas D. Cabot professor of public policy, epidemiology and population and international health within the Harvard School of Public Health. She is a social epidemiologist whose work is oriented toward understanding social inequalities in health and aging related to socioeconomic status, social networks, support, and social isolation. She has recently started research on labor issues related to job design and flexibility. 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. She has a Ph.D. in epidemiology from the University of California, Berkeley.

Barney Cohen (Study Director) is director of the Committee on Population of the National Academies/National Research Council (NRC). His work at the NRC has encompassed a wide variety of domestic and international projects, including studies on fertility, morbidity, mortality, housing, urbanization, migration, aging, and HIV/AIDS. Currently, he is also serving as the liaison of the National Academies to the Academy of Science of South Africa and the Ghanaian Academy of Arts and Sciences as part of a larger project aimed at supporting the development of academies of science in Africa. Dr. Cohen holds an M.A. in economics from the University of Delaware and a Ph.D. in demography from the University of California, Berkeley.

Dana A. Glei is a senior research investigator at Georgetown University. Since 2001, she has worked on the Social Environment and Biomarkers of Aging Study (Taiwan). During 2001-2009, she also served as project coordinator for the Human Mortality Database project (http://www.mortality.org), a joint collaboration between researchers at the University of California, Berkeley, and the Max Planck Institute for Demographic Research. Her current research focuses on the effects of smoking on mortality and sex differences in mortality, the impact of stressors on subsequent health, and the role of bioindicators in mediating the relationship between psycho

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