[1] Pricewaterhouse Coopers AG, Frankfurt, Germany
[2] PricewaterhouseCoopers PwC, Tax & Legal Serviceline, Frankfurt, Germany
[3] Univ Mannheim, Mannheim, Germany
[4] Ctr European Econ Res ZEW, Mannheim, Germany
[5] Univ Oxford, Ctr Business Taxat, Oxford, England
[6] Univ Oxford, Business Taxat, Oxford, England
[7] German Fed Minist Finance, Sci Advisory Comm, Berlin, Germany
[8] Univ Mannheim, Chair Business Adm & Taxat 2, Mannheim, Germany