在他去世之前,他是法兰克福歌德大学计量经济学教授和外管局数据中心项目主任。他曾是达姆施塔特理工大学的实证经济学和微观计量经济学教授,以及Würzburg大学的计量经济学教授,在那里他还教授数量经济学。他在比勒费尔德大学(1982年获得大众学位)和曼海姆大学(rer博士)获得大学学位。波尔。,1989, Dr.rer. pol. habil., 1995) and held research and teaching positions at the Université Catholique de Louvain-la-Neuve, CREST-INSEE, at Darmstadt University of Technology, CERGE-Prague, the University of the Federal Armed Forces (Munich) and at the University of Mannheim. He was SPES-fellow of the EU (1990-1992) and a fellow of the Deutsche Forschungsgemeinschaft (1992-1993). Since 1999, he was a research fellow at IZA.