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Member of the American Political Science Association (APSA).

Member of the German Political Science Association (DVPW).

Member of the German University Association (DHV).

Member of the Midwest Political Science Association (MPSA).

Member of the Network on Enlargement and new Membership of the European Union (NEMEU).

Member of the Standing Group on Analytical Politics and Public Choice of the European Consortium for Political Research (ECPR).

Member of the Standing Group on the European Union of the European Consortium for Political Research (ECPR).