中文摘要：

Xuan Chen （1978-）, Ph.D. of Management, postdoctor of Accounting Research Center, Tsinghua Umversity, Beijing, China, Postcode： 1,,00084; Main research fields： Accounting and Capital Market; Tel： 010-81730457, 13693182102; E-mail： chenx5 @em.tsinghua.edu.cn. Jinchun Guo, Ph.D. candidate of Management Science and Engineering, Huazhong University of Science and Technology, Wuhan, China, Postcode： 430074; Main research field： Financial Management; Tel： 13910149995; E-mail： guojinchun@cindamc.com.cn.