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.

My areas of teaching are EU tax law, tax law and business law. I mainly teach on the advanced level, and I am responsible for the Masters of European and International Tax Law (MEIT) programme: teaching around 200 hours a year.

After several years of active participation in an editorial committee for a Swedish tax law review, and further activities for the Swedish Branch of the International Fiscal Association (seminars), I am now more dedicated to deontological issues through my nomination as a president of the Executive Board of the European Association of Tax Law Professors. This association organises a yearly conference on burning theme of international tax law mostly for its members (professors and associate professors) and guests. This work is carried out on the side with my commitment with the GREIT (group for research for European and international tax law) publishing one book a year with a team of specialists, and organising a sommer school for doctoral students in Lisbon.