1. School of Economics and Finance Xi'an Jiaotong University Xi'an China
2. School of Accounting Nanjing University of Finance and Economics Nanjing Jiangsu China
3. Nanjing University of Aeronautics and Astronautics Nanjing Jiangsu China
4. School of Economics and Management Northwest University Xi'an China
5. School of Economics Ocean University of China Qingdao China