1. Institute of Communication Studies, Friedrich Schiller University Jena, Ernst Abbe-Platz 8, D-07743 Jena
2. Department of Political Science, University of Mannheim, MZES, A5, 6, 68131 Mannheim
3. Department of Politics and Public Administration, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz