Institution: | 1.School of Economics and Management, China University of Petroleum (East China), Qingdao, 266580, China ;2.China Petroleum Engineering & Construction Corp. North China Company, Hebei, 062552, China ;3.China Oil & Gas Pipeline Network Corp. (PipeChina) Oil & Gas Control Center, Beijing, 100013, China ;4.Business School, Linyi University, Shandong, 276000, China ;5.Department of Economics, Federal Urdu University, Islamabad, Pakistan ; |