Optimal reinsurance arrangements in the presence of two reinsurers

Optimal reinsurance arrangements in the presence of two reinsurers
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存在两个再保险公司时的最佳再保险安排

DOI:
10.1080/03461238.2012.723638
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发表时间:
2012-04
影响因子:
1.8
通讯作者:
Meng, Hui
Meng, Hui
中科院分区:
经济学3区
文献类型:
--
作者:
Chi, Yichun;Meng, Hui

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在本文中,我们从保险公司的角度研究了当他决定将部分损失分给两个再保险公司时的最佳再保险形式,其中第一个再保险公司根据期望值原则计算保费,而第二个再保险公司采用的保费原则满足三个公理:分布不变性、风险负荷和保留止损顺序。为了排除道德风险,典型的再保险条约假定保险公司和再保险公司都有义务为较大的损失支付更多的费用。在最小化保险公司总风险暴露的风险价值(VaR)或条件风险价值(CVaR)的标准下,我们证明最佳再保险政策是让出两个相邻层,其中上层分配给第一再保险公司。为了进一步说明我们的结果的适用性,我们通过假设第二再保险公司的广义王氏保费原则来明确推导出最优层再保险。
In this paper, we investigate the optimal form of reinsurance from the perspective of an insurer when he decides to cede part of the loss to two reinsurers, where the first reinsurer calculates the premium by expected value principle while the premium principle adopted by the second reinsurer satisfies three axioms: distribution invariance, risk loading, and preserving stop-loss order. In order to exclude the moral hazard, a typical reinsurance treaty assumes that both the insurer and reinsurers are obligated to pay more for the larger loss. Under the criterion of minimizing value at risk (VaR) or conditional value at risk (CVaR) of the insurer's total risk exposure, we show that an optimal reinsurance policy is to cede two adjacent layers, where the upper layer is distributed to the first reinsurer. To further illustrate the applicability of our results, we derive explicitly the optimal layer reinsurance by assuming a generalized Wang's premium principle to the second reinsurer.
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