Zhang, Runtong
Lu, Xinyi
Wu, Wen
Shang, Xiaopu
Funding for this research was provided by:
National Natural Science Foundation of China (71532002)
National Social Science Foundation of China (18ZDA086)
the Fundamental Research Funds for the Central Universities (2019YJS056)
Article History
Received: 14 May 2018
Accepted: 25 April 2019
First Online: 10 May 2019
Ethics approval and consent to participate
: Ethics approval (case reference number: BJ201704007) was obtained from the Ethics Committee of School of Economics and Management, Beijing Jiaotong University in China in which the study was undertaken. The informed consent was obtained in written form.
: Not applicable
: The authors declare that they have no competing interests.
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