is an academic researcher at the Collaborative Research Centre ‘Media of Cooperation’ at the University of Siegen. He has published widely on international cooperation, economic integration and political integration. His most recent books include Globale Welt: Europäische Geschichte 1970–2015; 70 Jahre Bundesrepublik Deutschland; (with G. Ambrosius), Integration of Infrastructures in Europe in Comparison (2016); (with G. Ambrosius and C. Neutsch, eds.), Föderalismus in historisch-komparativer Perspektive: Föderale Systeme: Kaiserreich – Donaumonarchie – Europäische Union (2015).