Aat Liefbroer (1958) is endowed professor of Demography of Young Adulthood and Intergenerational Transmission at the Department of Sociology. He also is Theme Leader Families & Generations at the Netherlands Interdisciplinary Demographic Institute (NIDI-KNAW) and professor of Life Course Demography at the Department of Epidemiology of the University Medical Centre Groningen, University of Groningen.
Liefbroer currently is National Coordinator of the European Social Survey (ESS), responsible for waves 10 and 11. Liefbroer also is National Coordinator of the Gender and Generations Programme (GGP).