[1] Sultan Qaboos Univ, Coll Econ & Polit Sci, Dept Econ & Finance, Muscat, Oman
[2] Univ Econ Ho Chi Minh City, Inst Business Res, Ho Chi Minh City, Vietnam
[3] Pusan Natl Univ, Inst Econ & Int Trade, Busan, South Korea
[4] Univ Econ Ho Chi Minh City, CFVG, Ho Chi Minh City, Vietnam
[5] Pusan Natl Univ, Dept Econ, Busan, South Korea