- Professor University Bremen, since 1974, co-director Center for Social Policy Research, since 1988. Co-director National Science Foundation German Research Foundation (Deutsche Forschungsgemeinschaft) approved Special Research Unit on Status Passage and Social Risks, Bremen University, 1987-2001. Visiting professor various universities in the United States and England.
- Time and Poverty in Western Welfare States: United Germany in Perspective
- Time and Poverty in Western Welfare States is the English language adaptation of one of the most important contributions to welfare economics published in recent years.