Author(s): |
Yong Zhang, Department of Economics and Management, Beijing Jiaotong University, No.3 of Shangyuancun, Haidian District, Beijing, China,100044 Yihong Ru, Department of Economics and Management, Beijing Jiaotong University, No.3 of Shangyuancun, Haidian District, Beijing, China,100044 Yongzhen Geng, Global Industrial Supply Co., LTD, NO.1 West Llake along the Armour, DeShengmen, Xicheng District, Beijing,China, 100035 |