[1] John von Neumann Univ, Hungarian Natl Bank Res Ctr, H-6000 Kecskemet, Hungary
[2] Univ Johannesburg, Coll Business & Econ, Dept Publ Management & Governance, ZA-2006 Johannesburg, South Africa
[3] Inst Technol & Business Ceske Budejovice, Res Dept Econ & Nat Resources Management, Okruzni 517-10, Ceske Budejovice 37001, Czech Republic
[4] Polish Acad Sci, Inst Philosophy & Sociol IFISPAN, Warsaw, Poland
[5] Univ Debrecen, Fac Econ & Business, H-4032 Debrecen, Hungary
[6] John von Neumann Univ, Hungarian Acad Sci, Hungarian Natl Bank Res Ctr, H-6000 Kecskemet, Hungary