Born in 1936 in Göttingen (Germany).
Professional career
- 1961 : " Diplômé " in mathematics, applied mathematics and physics at the University of Heidelberg
- 1964 : " Dissertation ", University of Heidelberg with thesis Über straffe Funktionale
- 1958-1966 : Teaching and research assistant, then lecturer at Heidelberg University (Institute of Applied Mathematics, then Department of Economics)
- 1966-1968 : Visiting Associate Professor, University of California (Berkeley)
- 1968-1976 : Research Professor, University of Louvain
- Since 1969 : Professor of Economics and Director of the Wirtschaftstheoretisches Institut at the University of Bonn
- Since 1970 : Visiting Professor at Berkeley (four times )
- 1993-1994 : Visiting Professor at the Collège de France, holding the annual European Chair
Awards and honors
- Member of the Rheinisch - Westfälische Akademie der Wissenschaften
- Member of the Academia Europaea
- Member of the Berlin-Brandenburgische, Akademie der Wissenschaften
- Honorary doctorate from Université Louis-Pasteur (Strasbourg)
- Gottfried-Wilhelm-Leibnitz Prize of the Deutsche Forschungsgemeinschaft
- Associate editor of several international journals, including the Journal of Mathematical Economics from 1974 to 1985