[1] Xi An Jiao Tong Univ, Jinhe Ctr Econ Res, Xian, Peoples R China
[2] Xi An Jiao Tong Univ, Jinhe Ctr Econ Res, Stand Chartered Bank China Ltd, Xian, Peoples R China
[3] Univ Leicester, Sch Business, Leicester, England
[4] Brunel Univ London, Dept Econ & Finance, Uxbridge, England