1. Department of Statistics, Athens University of Economics & Business, Stochastic Modeling and Applications Laboratory, Athens, Greece
2. Section of Mathematics, Hellenic Naval Academy, Mathematical Modeling and Applications Laboratory, Piraeus, Greece
3. Department of Mathematics, University of Sussex, Brighton, UK
4. Department of Financial and Management Engineering, University of the Aegean, Chios, Greece
5. Department of Geography, University of the Aegean, Mytilene, Greece
6. Department of Accounting and Finance, Athens University of Economics & Business, Athens, Greece