http://reply.papertrans.cn/1/98/9767/9767-21.png
http://reply.papertrans.cn/1/98/9767/9767-22.png
http://reply.papertrans.cn/1/98/9767/9767-23.png
Submitted on: 09 February 2004.
Revised on: 29 May 2004.
Accepted on: 19 July 2004.
___________________Finance Research Letters---ACADEMIC PRESS INC ELSEVIER SCIENCE
http://reply.papertrans.cn/1/98/9767/9767-25.png
Submitted on: 21 November 2016.
Revised on: 12 January 2017.
Accepted on: 26 February 2017.
___________________Finance Research Letters---ACADEMIC PRESS INC ELSEVIER SCIENCE
http://reply.papertrans.cn/1/98/9767/9767-27.png
Submitted on: 31 January 2003.
Revised on: 30 May 2003.
Accepted on: 02 July 2003.
___________________Finance Research Letters---ACADEMIC PRESS INC ELSEVIER SCIENCE
http://reply.papertrans.cn/1/98/9767/9767-29.png
http://reply.papertrans.cn/1/98/9767/9767-30.png