1. Associate professor of international relations in the Department of Politics and Public Administration at the University of Konstanz, Konstanz, Germany. This research was completed while Mader was a postdoctoral scholar in the School of Social Sciences at the University of Mannheim, Mannheim, Germany
2. Assistant professor in the Department of Social, Political and Cognitive Sciences at the University of Siena, Siena, Italy
3. Professor of political science in the Department of Social, Political and Cognitive Sciences at the University of Siena, Siena, Italy