[1] Abdul Wali Khan Univ, Inst Business Studies & Leadership, Mardan 23200, Pakistan
[2] Inst Management Sci, Dept Management Sci, Peshawar 25000, Pakistan
[3] Univ Siena, Business & Legal Studies Dept, I-53100 Siena, Italy
[4] Changwon Natl Univ, Dept Business Adm, Chang Won 51140, South Korea
[5] Yeungnam Univ, Dept Int Econ & Business, Gyongsan 38541, South Korea