Taxation and Sustainable Development: a European Perspective, National University of Singapore (NUS), Singapore, 2023 Democracy, Separation of Powers and Tax Administration, King’s College London, United Kingdom, 2023 Environmental Neutrality: Redesigning EU VAT to Support the European Green Deal, Global Conference on Environmental Taxation, University of Groningen, 2021 Corporate Taxation after Digitalization: Challenges for International Tax Systems, Leiden University & ICTD Research Colloquium, Netherlands, 2021 Taxpayer’s Rights in the Exchange of Information Framework, Max Planck Institute for Tax Law and Public Finance, Munich, 2019 Applying VAT to Digital Cross-Border Transactions, WU Global Tax Policy Center, Vienna University of Economics and Business, 2017