1. Zeppelin University of Friedrichshafen, CESifo , Friedrichshafen , Germany
2. Mendel University Brno , Brno , Czech Republic
3. Economic Institute, Slovak Academy of Sciences , Bratislava , Slovakia
4. Zeppelin University of Friedrichshafen , Friedrichshafen , Germany
5. East European Center for Research in Economics and Business (ECREB) , West-University Timisoara , Timisoara , Romania