Environmental Economy and Policy, Economic Policy, Institutional Economics
- 1987-88 Consultant to the parliamentary Social Democratic Party (SPD)
- 1988-91 Research at the Institute for European Environmental Policy
- Since 1991 Direktor of Research/Scientific Planing and Co-ordination at the Wuppertal Institute for Climate Energy Environment.
- 1997 Doctorate (Dr. rer.oec) at the BUGH Wuppertal.
- Lecturer at the University of Bonn
- January 1999 – May 2000 (Guest) Research Assistant at the Project Group.
- Since June 2000 head of the Factor Four Research Desk at the Wuppertal Institute, associated Research Fellow at the MPI.