Petersburg Polytechnic University, Institute for Industrial Economics and Management. Prior to this position, he was Assistant Professor at the Department of Innovation Management and Entrepreneurship, University of Klagenfurt, Austria (Habilitation), and Researcher at the WWU Münster, Germany (Doctorate). Rainer was Visiting Professor at the Vienna University of Economics and Business (Wirtschaftsuniversität Wien), at Klagenfurt University, and at Universitat Autònoma de Barcelona. His research interests are (international) entrepreneurship, firm growth, and innovation management.