Vorträge
2025
29. Juli – Reflections on Equality Rights, ICON-S 2025 Annual Conference, University of Brasilia
28. Juli – Book Roundtable - Guardians of Equality: How Courts Conceptualize Equal Protection and Non-Discrimination Guarantees, ICON-S 2025 Annual Conference, University of Brasilia
8. Juli – KI und Diskriminierung, Künstliche Intelligenz in der Rohstoffgewinnung und im Recht, Online-Tagung, RWTH Aachen
4. Juli – Book Talk: Equality’s Gaurdians, 12th Annual Conference of the Berkeley Center on Comparative Equality & Anti-Discrimination Law, Universität Ljubljana
22. Mai – Correcting Inequality through Law: A Comparative Socio-Legal Analysis of Why Apex Courts Adopt Different Conceptions of Equality, Law & Society Association Annual Meeting, Chicago
2024
9. Dezember – Equality’s Guardians: How Asian Apex Courts Conceptualize Equality, Constitutional Change in Asia in the 21st Century: 10th Asian Constitutional Law Forum, Hong Kong University
29. November – Equality, Climate Change, and Future generations, Peking University School of Transnational Law, Shenzhen
26. Oktober – Gleichheit durch Recht? Die Erfahrung der regionalen Menschenrechtsgerichte, Die Souveränität des Rechts: Symposium für Stefan Kadelbach aus Anlass seines 65. Geburtstags, Goethe Universität Frankfurt a.M.
11. Oktober – Verantwortung der Staatsrechtslehre im Spannungsfeld zwischen Recht und Politik, 83. Jahrestagung der Vereinigung der Deutschen Staatsrechtslehrer: Verfassungsrecht und Politik, Universität Luzern
1. Oktober – Equality, Climate Change, and Future generations in International Human Rights Law, National Chengchi University, Taipei
30. September – The relationship between international law and domestic law in Germany, National Chengchi University, Taipei
30. September – The Empirical Turn in Comparative Constitutional Law, Academia Sinica, Taipei
27. Juli – Equality, Climate Change, and Future generations, 11th Annual Conference of the Berkeley Centre for Comparative Equality and Antidiscrimination Law, National Law School of India University, Bangalore
8. Juli – Equality Rights of Future generations, The Future of Public Law: Resilience, Sustainability and Artificial Intelligence, ICON-S Conference 2024, IE Law School, Madrid
17. Juni – Das Verhältnis von Bundesverfassungsgericht und Europäischem Gerichtshof zwischen Konflikt und produktivem Dialog, Ringvorlesung 75 Jahre Grundgesetz: Der Verfassungsstaat in der Bewährung, Universität Münster
2023
22. August – The protection of equality by international Human Rights Courts and Tribunals, Universidade Federal de Minas Gerais, Belo Horizonte
6. Juli – Four models of equality: A normative assessment on how courts correct inequality through law, Australasian Society of Legal Philosophy Annual Conference, University of Auckland
4. Juli – Four models of equality: A normative assessment on how courts correct inequality through law, Islands and Ocean: Public Law in a Plural Word: ICON-S Conference 2023, Victoria University Wellington
31. Mai – A systematic analysis of the equality case law of the Supreme Court of Singapore, Inclusivity and Diversity in the Context of Asian Law: 20th ASLI Annual Conference, National University of Singapore
14. Mai – The construction of judicial deference and the use of scientific evidence in constitutional jurisprudence, The role of empirical data and scientific evidence in legitimizing judicial lawmaking, Vanderbilt University, Nashville
19. April – Como hacer investigación en derecho constitucional comparado desde una perspectiva cualitativa?, Universidad Autónoma, Santiago de Chile
1. März – The Primacy of EU Law and the Polish Constitutional Law Judgment, European Parliament, LIBE Democracy, Rule of Law and Fundamemtal Rights Monitoring Group, Brüssel
2022
6. Dezember – Qualitative Methods in Comparative Constitutional Law: A Plea for Process-Tracing, World Congress of Constitutional Law, University of Johannesburg
20. Oktober – International Law and the Present and Future of War, moderiertes Gespräch, The Outlook for Global Peace and the Future of Conflicts: CPG Annual Conference, Thammasat University, Bangkok
7. Oktober – Como hacer investigación en derecho constitucional comparado desde una perspectiva cualitativa?, Universidad de la Sabana, Bogotá
29. September – Primacy of EU Law: challenges and future perspectives, COMECE Legal Affairs Commission, Brüssel
2. September – Is Proportionality an Instrument of Judicial Activism?, International Dialogues in Constitutional Law, Universidade de Sao Paulo
30. August – The protection of equality by international Human Rights Courts and Tribunals, Universidade Federal de Minas Gerais, Belo Horizonte
11. August – Proporcionalidad y activismo jurídico – la experiencia alemana, Escuela de la Magistratura del Poder Judicial de Salta
10. August – Constitutional Design Based on Fear – a Case Study of Germany, Political Sentiments and Moral Emotions in Constitutional Law, IACL Roundtable, Universided de Córdoba, Argentina
5. Juli – Qualitative Methods in Comparative Constitutional Law: A Plea for Process-Tracing, Global Problems and Prospects in Public Law: ICON-S Conference, Universität Wroclaw
4. Juli – Correcting Inequality through Law, Global Problems and Prospects in Public Law: ICON-S Conference, Universität Wroclaw
16. Juni – The Construction of Judicial Deference and the Use of Scientific Evidence in Constitutional Jurisprudence, The role of empirical data and scientific evidence in legitimizing judicial lawmaking, Universität Tilburg
2. Juni – Equality and International Law, 2022 Sokol Colloquium on Comparative Human Rights Law, University of Virginia School of Law
9. Mai – Measuring Institutions, Panel des World Interdisciplinary Network for Institutional Research (WINIR) (online)
31. März – Not-so-Tiered Scrutiny: An Empirical Analysis of the U.S. Supreme Court’s Equal Protection Case Law, Information Society Project Ideas Lunch, Yale Law School (online)
4. März – The Primacy and Implementation of EU Law, Europäisches Parlament, LIBE Democracy, Rule of Law and Fundamemtal Rights Monitoring Group (online)
2021
15. September – Constitutional Courts as Guardians of the Rule of Law, Crisis of the Rule of Law in the Balkans and the European Union: 5th Summer University in the Balkans, Universität Tirana
23. Juli – The Empirical Turn in Legal Scholarship, Keynote-Vortrag, 18th Annual Meeting of the German Law & Economics Association, Freie Universität Berlin (online)
14. Juli – Primacy's Twilight? On the Legal Consequences of the Ruling of the Federal Constitutional Court of 5 May 2020 for the Primacy of EU Law, Europäisches Parlament, AFCO Committee (online)
6. Juli – Alexy and the “German” Model of Proportionality – An empirical evaluation of the reconstructive dimension of the Theory of Constitutional Rights, ICON×S Mundo (online)
24. Juni – The use of scientific evidence in constitutional jurisprudence, The use of scientific evidence and empirical data in judicial lawmaking in public interest cases, Unversität Tilburg (online)
4. Juni – La función de las ciencias sociales en la adjudicación constitucional, Seminario de Teoría Constitucional & Filosofía Politica, Universidad de Cordoba (online)
3. Juni – The Primacy of EU Law, Europäisches Parlament, LIBE Democracy, Rule of Law and Fundamemtal Rights Monitoring Group (online)
7. November – Human Rights in Times of Emergency, Interim Report, Raporteur der ILA Committee Human Rights in Times of Emergency (mit Ioana Cismas), Biannual Conference of the International Law Association, Kyoto (online)
5. März – Empirical Research in Constitutional Law, New York University School of Law
27. Feb. – Correcting Inequality through Law, Global Fellows Forum, New York University School of Law
2020
2019
28. Nov. – Le bonheur et le bien-être dans la constitution allemande et dans la jurisprudence de la Cour constitutionnelle allemande, Colloque Bonheur et bien-être dans le droit des Etats, Université d’Angers
18. Nov. – Introduction to Law & Economics, PhD workshop, Université de Luxembourg
2. Juli – Empirical Research in Constitutional Law: A Bird’s Eye View, Public Law in Times of Change, ICON-S Conference, Santiago de Chile
19. Mai – Book comment: Proportionality in Action – An Empirical Study on the Judicial Practice in Six Apex Courts, Israel Democracy Institute, Jerusalem
20. Dez. – Empirical Research in Constitutional Law, Bar-Ilan University, Tel Aviv
20. Okt. – What Is the Role of Customary International Law in Protecting International Human Rights?, International Law Weekend, New York
29. Sept. – Das Verhältnismäßigkeitsprinzip im Verfassungsrecht, Vortrag vor der Japanischen Forschungsgesellschaft für deutsches Verfassungsrecht, Chuo University, Tokyo
13. Juli – Legal Protection of Equality in a jurisdiction skeptical of judicial review – the case of New Zealand, Structures of Inequality in Global Comparison, Münster
26. Juni – What Role for Pluralism in Inter-Court Relationships? – An explanatory framework, Identity, Security, Democracy: Challenges for Public Law, ICON-S Conference, Hongkong
21. Juni – Proportionality and Its Discontents: Why Robert Alexy's Theory of constitutional rights fails to describe and to defend the judicial practice regarding proportionality, 10th World Congress of the International Association of Constitutional Law, Seoul
10. Mai – Proportionality and Judicial Activism, Union University, Belgrad
8. Mai – Empirische Verfassungsrechtswissenschaft: Potenzial und Grenzen, Recht im Kontext, Humboldt-Universität zu Berlin
10. Apr. – Empirical Research in Public Law: A bird's-eye view, Tim Koopmans Lecture, Universität Leiden
2018
6. Dez. – Equal Protection Guarantees and Judicial Self-Restraint, Tri-Nations Public Law Symposium, University of Auckland
23. Nov. – Equal Protection vs. Non-Discrimination Guarantees: Does It Make a Difference? – A Comparison of the experiences in the United States, New Zealand, and Germany, Victoria University Faculty of Law, Wellington
23. Okt. – Book talk: Does proportionality analysis promote judicial activism?, Centre for Comparative and Public Law, University of Hong Kong
21. Okt. – Can Customary International Law Contribute to Protecting the Global Commons?, CPG 8th International Conference: The Global Commons and the Governance of Unappropriated Spaces, Thammasat University, Bangkok
13. Okt. – Same-sex marriage: reflections on the German experience and how it compares to the Australian, University of New South Wales, Sydney
12. Okt. – The German Approach to Proportionality: A Model for Australia?, Sydney Law School
3. Okt. – The Globalization of Proportionality: Doctrinal convergence or divergence?, Melbourne Law School
7. Juli – Equal Protection Guarantees and Judicial Self-Restraint, ICON-S Conference: Courts, Power, Public Law, Kopenhagen
6. Juli – Building the Constitution - The Practice of Constitutional Interpretation in Post-Apartheid South Africa: Remarks from a German Comparative Lawyer, ICON-S Conference: Courts, Power, Public Law, Kopenhagen
25. Mai – Concepts, intérêts et valeurs dans l'interprétation du droit constitutionnel: rapport général, Journées internationales de l’Association Henri Capitant, Università degli Studi dell'Insubria, Como
7. Apr. – Die Rückkehr des "Bürgers" in der republikanischen Demokratietheorie, Menschenbilder im Recht, Universität Erlangen
24. Feb. – How External Constraints Shape Judicial Decision-Making, The Deliberative Performance of Constitutional Courts: An Empirical Perspective, Unversität Antwerpen
30. Jan. – The Principle of non-discrimination under the European Convention on Human Rights and the EU Charter on Fundamental Freedoms, Human Rights Issues in Europe and Asia, Tokyo
2017
2016
30. Nov. – Verschiedene Gleichheit, Antrittsvorlesung, Universität Münster
14. Okt. – The Political Backlash against Free Trade: Towards a New Era of Economic Isolationism?, CPG 7th Annual Conference: The Great Game Reloaded: Order and Disorder in Geopolitics and Global Governance, Thammasat University, Bangkok
3. Juni – Germany’s Judicial and Political Commitment to the Rule of EU Law, The Rule of Law in the EU and the Rule of EU Law, University of Liverpool
24. Mai – Mondialisation et circulation des personnes: rapport général, Journées internationales de l’Association Henri Capitant, Universität Münster
2015
6. Nov. – Grenzen des Völkergewohnheitsrechts beim Klimaschutz, Entgrenzungen des Rechts: Perspektiven des Öffentlichen Rechts in Münster, Universität Münster
25. Okt. – The Role of Ideology in the Debate on the Democratic Deficit of the European Union, CPG 6th Annual Conference: Law and Ideology, Thammasat University, Bangkok
10. Sept. – The Political Economy of the International Court of Justice: Judicial Strategies to Identify Customary International Law, Annual Conference of the European Society of International Law: The Judicialization of International Law: A Mixed Blessing?, University of Oslo
2. Juli – Balancing and Judicial Activism: How Courts are Coping with Normative Uncertainty when Applying the Proportionality Test, ICON-S 2015 Conference: Public Law in an Uncertain World, NYU School of Law, New York
19. Juni – Der Schutz von Minderheiten als Schranke der Meinungsäußerungsfreiheit, Jahrestagung der Deutschen Vereinigung für Internationales Recht, Frankfurt a.M.
18. Juni – El control constitucional de las medidas contra el terrorismo, Seguridad en Libertad: Congreso Internacional Jurídico, Universität Konstanz
29. Mai – The Psychology of Judging: Judicial Strategies to Identify Customary International Law, Law & Society Association Conference, Seattle
22. Mai – Tiers et droit public: rapport allemand, Journées internationales de l’Association Henri Capitant, Universidad de Panama, Chitré
2014
10. Dez. – The German Constitutional Court and the EU Financial Architecture, Amsterdam Centre for European Law and Governance, University of Amsterdam
31. Okt. – Customary International Law and Public Goods, Custom in Crisis: International Law in a Changing World, Duke Law School, Durham
18. Sept. – The Concept of Constitutional and Legal Pluralism, 9th Annual Conference of the Group for Research on European and International Taxation, Universität Münster
27. Juni – Wettbewerbsbehörden als subsidiäre Regulierungsbehörden, Habilitationsvortrag, Universität Bonn
16. Mai – The Political Economy of Customary Law, The Political Economy of International Law, Università Sapienzia, Rom
5. Apr. – Legislative Inconsistency and the “Smoking Out” of Illicit Motives, 3rd Annual Younger Comparativists Conference, Lewis & Clark Law School, Portland
2. Dez. – Is There a Right to Pro-Democratic Intervention in International Law?, Ruhr-Universität Bochum
6. Sept. – El principio de coherencia en la jurisprudencia del Órgano de Apelación de la OMC, Congreso Internacional de Derecho Público: Encrucijadas del Estado Moderno, Universidad Santo Tomás, Bogotá
13. Juli – Customary Law, Consent, and the Status Quo Paradox, The Role of Opinio Juris in Customary International Law, Université de Genève
8. Juli – How to Compare the Length of Lines to the Weight of Stones: Balancing and the Resolution of Value Conflicts in Public Law, 2nd Workshop on Comparative Administrative Law in Asia: Proportionality & Democratic Accountability, Academia Sinica, Taipei
14. Apr. – Constitutional Courts and Legislative Capture, The Changing German Landscape of Theorizing Public Law, NYU School of Law, New York
6. Feb. – Gerichte als Wettbewerbshüter des politischen Prozesses, 53. Assistententagung Öffentliches Recht: Das letzte Wort: Rechtsetzung & Rechtskontrolle in der Demokratie, Universität Bern
2013
25. Juni – Proportionality and the Incommensurability Challenge: Some Lessons from the South African Constitutional Court, South African Institute for Advanced Constitutional, Public, Human Rights & International Law, University of Johannesburg
20. Apr. – Empirical Arguments in Constitutional Law, Law and Economics in Europe: Foundations and Applications, Universität Luzern
13. Jan. – Eingriffsdogmatik aus deutscher Perspektive, Der Grundrechtseingriff, Wirtschaftsuniversität Wien
2012
28. Okt. – Initiativen der UN zu Demokratisierung und Good Governance, Entwicklungstrends zu mehr globaler Demokratie: Eine Zwischenbilanz 15 Jahre nach der Agenda für Demokratisierung, Deutsche Gesellschaft für die Vereinten Nationen, Berlin
23. Sept. – Antitrust Law and the Promotion of Democracy and Economic Growth, 28th Annual Conference of the European Association of Law & Economics, Hamburg
16. Aug. – The Role of Economics and Social Sciences in Constitutional Adjudication, XXV. World Congress of Philosophy of Law and Social Philosophy: Special Workshop ‘Law and Economics – Foundations and Applications’, Universität Frankfurt a.M.
19. Juli – Judicial Balancing and Legislative Margin of Appreciation, Paradoxes of Constitutionalism, TU Dresden
23. Juni – Antitrust Challenges of Deep Globalization, 12th Annual Conference of the American Antitrust Institute: International Economics for Antitrusters: Learning from Two Decades of Deep Globalization, Washington D.C.
2011
10. Dez. – Antitrust Law and the Promotion of Democracy and Economic Growth, Sixth Annual Conference of the Italian Society of Law and Economics, Bozen
12. Nov. – The Role of Consent in the Formation of Customary International Law, ASIL Symposium on Reexamining Customary International Law, Washington D.C.
4. Nov. – The Effect of Antitrust Institutions on Economic Development and Democracy, Hamburg Lectures on Law and Economics, Universität Hamburg
12. Jan. – Informationsgewinnung als Methodenproblem: Braucht die Rechtswissenschaft eine empirische Wende?, Karlsruher Dialog zum Informationsrecht, Karlsruhe Institute of Technology
2010
2. Aug. – International Law, Democracy and Cultural Diversity, Second Biennial General Conference of the Asian Society of International Law: International Law in a Multipolar and Multi-civilizational World: Asian perspectives, Challenges and Contributions, Tokyo
2009
6. Dez. – Die Rechtsprechung des US Supreme Court zur innerstaatlichen Wirkung von Völkerrecht, Tagung des Arbeitskreises junger Völkerrechtler: Wirkung von Völkerrecht im innerstaatlichen Bereich, Wien
12. Juni – Rational Choice or Deliberation? – Customary International Law between Coordination and Constitutionalization, Seminar on the New Institutional Economics: Coordination in the Absence of Sovereignty, Lübbenau
2008
7. Dez. – Asia and the Right to Democratic Governance, ALIN International Academic Conference: Asia’s Emerging Laws in the Digital Age, Bangkok
30. Nov. – Anforderungen des Völkerrechts an die Legitimität politischer Entscheidungen: zwischen domaine réservé und right to democratic governance, Interdisziplinären Forschungskolloquium zur demokratischen Legitimität ethischer Entscheidungen, Heidelberg
2007
14. Mai – A Democratic Union: Coherent Constitutional Concept or Prosaic Declaration of Intent?, 2nd German-Polish Seminar: The Unity of the European Constitution, Breslau