[1] Forman Christian Coll Univ, Dept Stat, Lahore, Pakistan
[2] Natl Coll Business Adm & Econ, Dept Stat, Lahore, Pakistan
[3] Univ Southern Denmark, Dept Border Reg Studies, DK-6400 Sonderborg, Denmark
[4] POSTECH, Dept Ind & Management Engn, Pohang 790784, South Korea