1. Research and teaching associate, Division of Media Economics and Management, IKMZ - Department of Communication and Media Research, University of Zurich, Zurich, Switzerland
2. Head of Division, Media Business Division, Department of Communication, Johannes Gutenberg University Mainz, Mainz, Germany
3. Senior research and teaching associate, Division of Media Economics and Management, IKMZ - Department of Communication and Media Research, University of Zurich, Zurich, Switzerland
4. Full Professor of Media Economics & Management, Head of Division, Division of Media Economics and Management, IKMZ - Department of Communication and Media Research, University of Zurich, Zurich, Switzerland
5. Consultant, Private enterprise, Munich, Germany