Submitted on: 22 October 2000.
Revised on: 01 December 2000.
Accepted on: 15 December 2000.
Scandinavian Actuarial Journal
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http://reply.papertrans.cn/3/276/27503/27503-23.png
Submitted on: 02 July 2018.
Revised on: 01 August 2018.
Accepted on: 21 August 2018.
Scandinavian Actuarial Journal
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http://reply.papertrans.cn/3/276/27503/27503-26.png
Submitted on: 22 February 2020.
Revised on: 25 March 2020.
Accepted on: 22 April 2020.
Scandinavian Actuarial Journal
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Submitted on: 30 September 2016.
Revised on: 17 October 2016.
Accepted on: 02 November 2016.
Scandinavian Actuarial Journal
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