Hans-Peter Kohler is the Interim Director of the Graduate Group in Demography (GGD)

Hans-Peter Kohler, who is the Frederick Warren Professor of Demography and Professor of Sociology--as well as the most recent Past-Director of the GGD, will stand in for Michel Guillot, Professor of Sociology and PSC Associate Director for Training, while Michel takes a well-earned sabbatical at INED, the French national demography institute and an international partner of Penn's PSC.