1. School of Management Science and Information Engineering, Jilin University of Finance and Economics, Jilin, China
2. School of Economics and Finance, Xi'an Jiaotong University, Xi’an, China
3. Marketing-Management Department, Romanian-American University, Bucharest, Romania
4. Marketing Department, Harbin University of Commerce, Harbin, China
5. Marketing Department, Bucharest University of Economic Studies, Bucharest, Romania