Prof. Dr. Hagist received his Diploma (M.Sc. equivalent) in Economics from the University of Freiburg (Germany) in 2003 after five years of studying in Freiburg and at UW-Madison, Wisconsin (USA). From 2003 to 2007 he was a PhD student/researcher at the Research Center for Generational Contracts (University of Freiburg (Germany)) and a Visiting Scholar at Boston University (USA), where he worked together with Laurence J. Kotlikoff. In 2007 he received his doctorate for his dissertation "Demography and Social Health Insurance", which was supervised by Bernd Raffelhüschen. He was awarded the Friedrich-August-von-Hayek-Award for his dissertation. Furthermore Prof. Hagist received the Walter-Eucken-Award for his post-doctoral studies by the University of Jena (Germany). In 2012 he obtained the venia legendi in Economics from the University of Freiburg. During his post-doc studies, he visited the University of Bergen as a visiting scholar several times and taught at the Université XII at Paris (France). Prof. Hagist has provided testimony to the German Bundestag and the Landtag (state congress) of Northrine-Westfalia on several occasions.