作者机构:[1]School of Business, Renmin University of China, Beijing 100872, China, [2]Guanghua School of Management, Peking University, Beijing 100871, China
相关基金:Acknowledgements The author gratefully acknowledges the financial supports from the National Natural Science Foundation of China (No. 70940025) and the Humanities and Social Science Research Project of Ministry of Education of China (No. 11YJC630270).