1. Max Planck Institute for the Study of Societies, Cologne, Germany
2. European Studies Department, University of Amsterdam, Amsterdam, The Netherlands
3. Department of Political Science, Institute of Management Research, Radboud University, Nijmegen, The Netherlands
4. Department of Management and Production Engineering, Politecnico di Torino, Turin, Italy
5. Department of Public Governance and Management, Ghent University, Ghent, Belgium