1. Vienna Institute of Demography (OeAW); Wittgenstein Centre for Demography and Global Human Capital (IIASA, OeAW, University of Vienna), Vienna, Austria
2. Autonomous University of Barcelona, Barcelona, Spain; Center for Demographic Studies, Barcelona, Spain
3. University of Vienna; Wittgenstein Centre for Demography and Global Human Capital (IIASA, OeAW, University of Vienna), Vienna, Austria