First Author:   Botao Qin Xi'an Jiaotong University bqinecon@xjtu.edu.cn   No. 28 West Xianning Road Xi'an, 710049, China       Second Author: Jason F Shogren University of Wyoming jramses@uwyo.edu         Third Author: Thorsten Janus University of Wyoming tjanus@uwyo.edu   Department 3985, 1000 East University Avenue Laramie, 82071, U.S.A   (307) 766-3384(Phone)