1. Department of Statistics & Laboratory of Statistical Methodology, Athens University of Economics and Business, Athens, Greece
2. Université de Nantes & LS2N UMR CNRS 6004, Nantes, France
3. Centre for Quality and Change Management, Universitat Politècnica de València, València, Spain
4. Department of Business Administration, University of Piraeus, Piraeus, Greece
5. Department of Statistics and Insurance Science, University of Piraeus, Piraeus, Greece