[1] Univ Peloponnese, Dept Econ, Sch Management & Econ, Tripolis 22100, Greece
[2] Pante Univ, Dept Econ & Reg Dev, GR-17671 Athens, Greece
[3] Bournemouth Univ, Dept Accounting Finance & Econ, Execut Business Ctr, 89 Holdenhurst Rd, Bournemouth BH8 8EB, Dorset, England
[4] Univ Surrey, Fac Econ Business & Law, SEEC, Guildford GU2 5XH, Surrey, England