Sustainable Social Security. Social assistance in developing and transitional countries. Report on development strategies with regard to persons with reduced capacity for self-help (Gesellschaft für technische Zusammenarbeit, GTZ; Germany development agency) (2004-2006)
(for details see 'Research')
Policy Report for Social Security Reform under the Tenth Five-Year Plan (People's Republic of China) (Asian Development Bank, ADB, TA 3607 PRC, 2001) (rural pensions)
(for details and download of the final report see 'Research')
Member of HelpAge Germany
German Social Welfare Association (reform of social assistance, 2002)
Federal German government, National Report on Wealth and Poverty (1999-2000)
Personal advisor to Ms Fischer, Minister of Health, Federal German Government, Berlin (2000)
Federal Parliament, Germany, Green Party, commission on welfare state reform (1996- )
Federal German government, Green Party, commission on old-age pensions (1999-2000)
Federal Parliament, Germany, Green Party, commission on basic income/social assistance (1997-98)
Federal Parliament, Germany, Green Party, commission on old-age pensions (1997-98)
Federal Parliament, Germany, Christian-Democratic Party, commission on employment promotion (1997-98)
Catholic and Protestant Churches, Consultation process on social change (1995)
Federal Parliament, Germany, Hearings on reform of social assistance (1995, 1996)
Local government (state and city of Bremen) and welfare associations in Germany on poverty and social assistance (1990-98)
Fakultät 
Personen 
