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Baden-Baden: Nomos, 2017
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Bonn: Institut "Finanzen und Steuern", 2002
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Berlin: Stiftung Marktwirtschaft, 2010
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San Domenico: European University Institute, Department of Law, 2015
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San Domenico: European University Institute, Department of Law, 2015
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Baden-Baden: Nomos, [2017]
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Köln: Max-Planck-Inst. für Gesellschaftsforschung, 2015
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Baden-Baden: Nomos, 2020