1991
Postdoctoral (Second German doctorate). Leipzig University

1980-1983
PhD, Leipzig University

2009 - present
Editorial Board of the International Review for Social History, Amsterdam

2004 - present
Co-editor of ‘Sklaverei und Postemanzipation. Esclavitud y Postemancipación’ (Slavery and Postemancipation). München, Hamburg, Berlin: LIT-Verlag

2007 - 2012
Member of the Research Group „Global Labour Relations“ (responsable for Latin America 1500-2000); IISG Amsterdam

2003 - present
Member of the transnational network „The Law in Slavery and Freedom“, University of Michigan, Ann Arbor