[1] Univ Lodz, Fac Econ & Sociol, Dept Econ Policy, POW 3-5, PL-90255 Lodz, Poland
[2] SGH Warsaw Sch Econ, Niepodleglosci 162, PL-02554 Warsaw, Poland
[3] Univ Seville, Dept Ind Org & Business Management, Camino Descubrimientos S-N, Seville 41092, Spain
[4] Univ Informat Technol & Management, Dept Econ & Finance, Sucharskiego 2, PL-35225 Rzeszow, Poland
[5] Pablo de Olavide Univ, Dept Econ, Carretera Utrera,Km 1, Seville 41013, Spain