http://reply.papertrans.cn/2/128/12712/12712-21.png
http://reply.papertrans.cn/2/128/12712/12712-22.png
http://reply.papertrans.cn/2/128/12712/12712-23.png
http://reply.papertrans.cn/2/128/12712/12712-24.png
Submitted on: 23 February 2010.
Revised on: 16 May 2010.
Accepted on: 08 July 2010.
___________________INSURANCE MATHEMATICS & ECONOMICS
http://reply.papertrans.cn/2/128/12712/12712-26.png
http://reply.papertrans.cn/2/128/12712/12712-27.png
http://reply.papertrans.cn/2/128/12712/12712-28.png
http://reply.papertrans.cn/2/128/12712/12712-29.png
Submitted on: 24 August 2000.
Revised on: 20 October 2000.
Accepted on: 13 November 2000.
___________________INSURANCE MATHEMATICS & ECONOMICS