School of Economics and Management University of Chinese Academy of Sciences Beijing 100049 China;
LS2N UMR CNRS 6004 IMT Atlantique Nantes 44300 France;
LS2N UMR CNRS 6004 IMT Atlantique Nantes 44300 France;
LS2N UMR CNRS 6004 University of Nantes Saint-Nazaire 44606 France;