PhD in Demography, University of Pennsylvania. Founding Director, Wittgenstein Centre for Demography and Global Human Capital; Leader, World Population Program, International Institute for Applied Systems Analysis; Director, Vienna Institute of Demography, Austrian Academy of Sciences; Professor of Applied Statistics, WU-Vienna. Extensive research experience in Europe, Africa and Asia. Publishes frequently in Science and Nature. Research interests include global population, education, development and environment interactions.