1. School of Economics, Shandong Technology and Business University, Shandong, Yantai, P.R. China
2. School of Economics and Trade, Hunan University, Yuelushan, Changsha, Hunan, China
3. Graduate School of Economics and Management, Ural Federal University, Ekaterinburg, Russia
4. Department of Business Administration, Iqra University, Karachi, Pakistan