[1] Indus Univ, Fac Management Sci, Gulshan 17, Karachi 75300, Pakistan
[2] Natl Tech Univ Athens, Photometry Lab, Elect Power Div, Sch Elect & Comp Engn, 9 Heroon Polytechniou St, Athens 15780, Greece
[3] Lithuanian Ctr Social Sci, Inst Econ & Rural Dev, A Vivulskio G 4A-13, LT-03220 Vilnius, Lithuania
[4] Univ Econ & Human Sci Warsaw, Fac Management & Finances, PL-01043 Warsaw, Poland