[1
]Hui Liu is assistant professor of sociology at the Michigan State University. Her
research examines how social factors are related to health, health behavior, and mortality.
Her recent interests focus on historical changes in the relationships between health
outcomes and social factors such as marital status and education. She also conducts
methodological work on modeling over-dispersed count data.
[2
]Debra Umberson is professor of sociology and a faculty associate in the Population
Research Center at the University of Texas at Austin. Her research focuses on relationships
and health across the life course. Her current research, supported by the National
Institute on Aging, considers how different types of relationships influence health
behaviors over the life course.