Finite-time dividend problems in a Lévy risk model under periodic observation

Finite-time dividend problems in a Lévy risk model under periodic observation
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周期性观察下 Lévy 风险模型中的有限时间红利问题

DOI:
10.1016/j.amc.2021.125981
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发表时间:
2021-06
影响因子:
4
通讯作者:
Zhimin Zhang
Zhimin Zhang
中科院分区:
数学2区
文献类型:
--
作者:
Jiayi Xie;Zhimin Zhang

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在本文中,我们使用一个Lévy过程来模拟保险公司的剩余流量。假设盈余水平是在一系列固定时间观察到的,并且在每个观察时间做出股息决策。如果观察到的盈余水平大于给定的障碍,那么多余的金额将作为一次性股息支付。此外,我们假设一旦观察到的盈余水平是负的,破产被宣布。利用Fourier余弦级数展开方法,给出了破产前有限时间期望折现红利支付和有限时间期望折现罚金函数的数值计算方法.误差分析和数值算例表明了该方法的精度和有效性。
In this paper, we use a Lévy process to model the surplus flow of an insurance company. It is assumed that the surplus level is observed at a sequence of fixed times and dividend decisions are made at each observation time. If the observed surplus level is larger than a given barrier, then the excess amount would be paid off as a lump sum of dividends. Further, we assume that ruin is declared as soon as the observed surplus level is negative. Using the Fourier cosine series expansion method, we propose some numerical methods for computing the finite-time expected discounted dividend payments before ruin and the finite-time expected discounted penalty function. Both error analysis and numerical examples are given to show accuracy and efficiency of our method.
DOI: 10.2143/ast.41.2.2136991
发表时间: 2011-11
期刊: Astin Bulletin
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