University of Bonn, University of Bayreuth, University of Bayreuth, University of Bonn, affiliation not provided to SSRN, University of Bonn, University of Bonn, Leibniz University Hannover, Leibniz University Hannover, affiliation not provided to SSRN, Research Centre Jülich, affiliation not provided to SSRN, affiliation not provided to SSRN, Technische Universität München (TUM), affiliation not provided to SSRN, affiliation not provided to SSRN and University of Bayreuth