[1] Eastern Mediterranean Univ, Dept Econ, Via Mersin 10, Famagusta, Northern Cyprus, Turkey
[2] Univ Pretoria, Dept Econ, ZA-0002 Pretoria, South Africa
[3] Helmut Schmidt Univ, Dept Econ, Holstenhofweg 85,POB 700822, D-22008 Hamburg, Germany
[4] IPAG Business Sch, Paris, France