About the Authors
- Shaojian Qu
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* E-mail: qushaojian@163.com
Affiliation Business School, University of Shanghai for Science and Technology, Shanghai, P.R. China
- Ying Ji
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¤ Current address: Room 721, Business School, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, P.R. China
Affiliations Business School, University of Shanghai for Science and Technology, Shanghai, P.R. China, The Logistics Institute-Asia Pacific, National University of Singapore, Singapore, Singapore
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: SJQ. Performed the experiments: YJ. Analyzed the data: SJQ YJ. Contributed reagents/materials/analysis tools: YJ. Wrote the paper: SJQ YJ. The proof of theorems: SJQ.