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First Author:
Botao Qin
Xi'an Jiaotong University
No. 28 West Xianning Road, Xi''an Jiaotong University, Jinhe Center for Economic Research
Xi''an, 710049, China

Second Author:

Thorsten Janus
University of Wyoming
1000 E. University Ave., Department of Economics, University of Wyoming
Laramie, 82071, U.S.A