http://reply.papertrans.cn/3/201/20050/20050-31.png
http://reply.papertrans.cn/3/201/20050/20050-32.png
Submitted on: 16 November 2007.
Revised on: 15 December 2007.
Accepted on: 29 December 2007.
JOURNAL OF VALUE INQUIRY
http://reply.papertrans.cn/3/201/20050/20050-34.png
http://reply.papertrans.cn/3/201/20050/20050-35.png
Submitted on: 16 March 2009.
Revised on: 09 April 2009.
Accepted on: 14 April 2009.
JOURNAL OF VALUE INQUIRY