1. Department of Economics, AUEB, Athens 104 34, Greece ()
2. Essex Business School, University of Essex, Colchester CO4 3SQ, United Kingdom ()
3. Graduate School of Business, Nazarbayev University, Astana 010000, Kazakhstan ()
4. Ipag Business School, 75006 Paris, France, and Department of IEES, AUEB, Athens 104 34, Greece ()