Optimal insurance design under Vajda condition and exclusion clauses

Optimal insurance design under Vajda condition and exclusion clauses
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Vajda条件和除外条款下的最优保险设计

DOI:
10.1080/03610926.2020.1860223
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发表时间:
2021-01
影响因子:
0.8
通讯作者:
Yijun Hu
Yijun Hu
中科院分区:
数学4区
文献类型:
--
作者:
Yanhong Chen;Yijun Hu

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摘要本文研究了考虑除外责任条款的最优保险问题。保险标的的可保损失与保险标的的可保损失是相互排斥的。我们的目标是通过最小化投保人负债的风险调整价值来表征最优保险策略,其中意外损失由风险价值(VaR)或尾部风险价值(TVaR)计算。为了防止道德风险和体现保险的精神,我们分析了一类让渡损失函数上的最优解,使得投保人的自留损失和保险人支付的比例都增加。我们证明了,如果保险费原则满足风险负载和凸序保持,每个可接受的保险合同是次优的割让损失函数组成的三个互联线段。如果保费原则满足一个附加的弱性质,则最优保险的形式可以进一步简化。最后,我们推导出最优保险明确的期望值原则和王的原则。
Abstract In this paper, we explore the optimal insurance problem where the exclusion clause is taken into account. Assume that the insurable loss is mutually exclusive from another loss that is denied in the insurance coverage. Our objective is to characterize the optimal insurance strategy by minimizing the risk-adjusted value of a policyholder’s liability, where the unexpected loss is calculated by either the value at risk (VaR) or the tail value at risk (TVaR). To prevent moral hazard and to reflect the spirit of insurance, we analyze the optimal solutions over the class of ceded loss functions such that the policyholder’s retained loss and the proportion paid by an insurer are both increasing. We show that every admissible insurance contract is suboptimal to a ceded loss function composed of three interconnected line segments if the insurance premium principles satisfy risk loading and convex order preserving. The form of optimal insurance can be further simplified if the premium principles satisfies an additional weak property. Finally, we derive the optimal insurance explicitly for the expected value principle and Wang’s principle.
VaR风险测度和Vajda条件下保险公司和再保险公司视角下的最优再保险
DOI: 10.1080/03610926.2019.1710197
发表时间: 2020-01
期刊: Communications in Statistics - Theory and Methods
影响因子: --
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