Prof. Dr. DDr. h.c. Michael Lang is head of the Institute for Austrian and International Tax Law of WU (Vienna University of Economics and Business) and academic director of both the LLM Program in International Tax Law and of the Doctoral Program in International Business Taxation (DIBT) of this university. He is president of the Austrian Branch of the International Fiscal Association (IFA). He has been visiting professor at Georgetown University, New York University, Sorbonne, Bocconi, Peking University (PKU), University of New South Wales (Sydney), and at other universities. He has specialized specifically in tax treaty law and in European tax law.