¹ PRIO, Oslo, Norway, ² University of Oslo, Oslo, Norway, ³ University of Gothenburg, Gothenburg, Sweden

European University Institute, Florence, Italy

¹ University of Reading, Reading, United Kingdom, ² University of Oslo, Oslo, Norway, ³ Humboldt-Universität zu Berlin, Berlin, Germany, ⁴ University of Leiden, Leiden, Netherlands, ⁵ University of Copenhagen, Copenhagen, Denmark, ⁶ Pennsylvania State University, University Park, United States

Cologne Center for Comparative Politics, University of Cologne, Cologne, Germany

University of Amsterdam, Amsterdam, Netherlands