Dr. Jen-Hao Chen is currently a Professor in the Department of Sociology and the Department of Psychology at National Chengchi University (NCCU), Taiwan, where he also holds the Yushan (Young) Fellowship. Before joining NCCU, he was on the faculty at the University of Missouri and Rutgers University. His research focuses on the evolving nature of social and familial relationships and how these interactions affect health and well-being. He also examines health disparities over the life course. His work has been published in journals such as the Journal of Gerontology: Psychological and Social Sciences, Journal of Health and Social Behavior, and Social Science & Medicine. He currently serves as an Associate Editor for Population Research and Policy Review and the European Journal of Ageing.