1. School of Economics and Finance, Queen Mary University of London, London E1 4NS, United Kingdom;
2. Alliance Manchester Business School, University of Manchester, Manchester M13 9PL, United Kingdom;
3. Department of Banking and Financial Management, University of Piraeus, Piraeus 18534, Greece;
4. Associate Research Fellow with Cass Business School, London EC1Y 8TZ, United Kingdom and Warwick Business School, Coventry CV4 7AL, United Kingdom;
5. Independent Authority for Public Revenue, 10184 Athens, Greece