RoseannGiarrussoisaResearchAssociateProfessorofGerontologyandSociologyat the University of Southern California, and the Project Director of the Longitudinal Study of Generations. Her research interests include intergenerational family relations, social psychology, and the sociology of aging and the life course. Her most recent publications include an examination of reciprocity in parent–child relations over the life course, cross-ethnic differences in grandparent–adult grandchild solidarity, and how the self-concept changes across two decades.