Duane F. Alwin is the Tracy Winfree and Ted H. McCourtney Professor of Sociology and Demography at The Pennsylvania State University, where he currently directs the Center on Population Health and Aging, an National Institute on Aging-funded Demography of Aging center. He received a PhD in sociology and educational psychology from the University of Wisconsin in 1972. He is currently Chair of the Section on Aging and the Life Course of the American Sociological Association. His research interests include a wide range of phenomena concerned with aging and the life course, and he is best known fo...