1. Department of Political Science, University of Oslo, Oslo, Norway
2. Comparative Political Behavior, Humboldt-Universität zu Berlin, Berlin, Germany
3. Department of Politics and International Relations, University of Reading, Reading, UK
4. Institute of Political Science, Leiden University, Leiden, Netherlands
5. Documentation Centre Dutch Political Parties of Groningen University, Groningen, Netherlands
6. Department of Political Science, University of Copenhagen, Copenhagen, Denmark
7. Department of Comparative Politics, University of Bergen, Bergen, Norway
8. Institute of Public Administration, Leiden University, Leiden, Netherlands
9. School of Public Policy, Pennsylvania State University, University Park, PA, USA