Dr. Dieter Christian is a lecturer at the Vienna University of Economics and Business, several other Austrian universities and various private seminar companies. He is an author in the area of IFRS and Austrian GAAP. He was formerly a Senior Manager and head of the department for IFRS and Austrian GAAP at BDO Austria and also worked in the IFRS department for PricewaterhouseCoopers in Austria. He has a Doctorate in Business Administration and an MBA from Vienna University of Economics and Business. He is a Member of the IFRS working group of the Austrian Financial Reporting and Auditing Committee (AFRAC). Dr. Norbert Lüdenbach is a tax advisor and chartered accountant, and is Head of the IFRS Department of BDO Germany. He is an author of commentaries on IFRS and German GAAP as well as being a lecturer at the University of Freiburg (Germany). He is also the publisher of a practice-oriented German IFRS journal which is published on a monthly basis.