In charge of a Masters Programme on European and International Tax Law, founder of the GREIT network together with Dorado, Pistone, and Weber, active researcher in the field of EU tax law. My research deals with international tax law, and more specifically, the development of the rule of law in the European Union and other international organizations in the field of direct taxation. In the mid-90s I started to focus on the EU Parent-Subsidiary directive and group taxation in the EU as well as cross-border taxation of royalties and technology transfers. More recently, my focus is on human rights and taxation, and individual taxation of cross-border pensions. On a more theoretical level, I am involved in the assessment of tax laws retrospectively, especially in light of the State aid prohibition in the EU. My research also aims to initiate a dialogue with economists in selected interdisciplinary fields of study, and I'm editing a book on tax sustainability right now.