[1] Ferdowsi Univ Mashhad, Dept Agr Econ, Mashhad 9177948974, Razavi Khorasan, Iran
[2] Univ Dev Studies, Dept Agr Econ, POB TL1350, Tamale, Ghana
[3] Zhengzhou Univ, Sch Management Engn, Dept Management Sci & Engn, 100 Kexkue Blvd, Zhengzhou 450001, Peoples R China
[4] Wroclaw Univ Sci & Technol, Dept Operat Res & Business Intelligence, PL-50370 Wroclaw, Poland
[5] Wroclaw Univ Sci & Technol, Fac Elect Engn, PL-50370 Wroclaw, Poland