共查询到19条相似文献,搜索用时 156 毫秒
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应用逐段决定马尔可夫过程理论及补充变量技巧,使Markov-modulated风险过程成为齐次强马尔可夫过程,然后利用强马氏性及首达时间分布给出了其破产前最大盈余额与破产赤字的联合分布. 相似文献
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古典风险模型下的绝对破产 总被引:1,自引:1,他引:0
在古典绝对破产模型下盈余过程为是逐段决定马尔可夫过程.根据逐段决定马尔可夫过程具有马氏性和强马氏性,本文推导出了在古典风险模型下绝对破产概率的一个明确表达式. 相似文献
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研究了一类双险种风险模型,其中索赔到达计数过程和保费到达计数过程均为非齐次Po isson过程,用鞅方法得到了有限时间破产概率的一个上界,并给出了当两个险种的个体索赔均服从指数分布时,有限时间破产概率的上界估计. 相似文献
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该文考虑变保费率的扰动风险模型, 其中索赔的分布是重尾的. 对这个风险模型, 给出了索赔剩余过程的精细大偏差; 同时, 还得到了它的有限时间破产概率的Cramer-Lundberg型极限结果. 相似文献
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本文研究了一类保费与索赔均为批量到达的双险种破产模型,在特定的分布下导出了调节系数方程,得到了初始资本为u的破产概率的上界并与非批量到达的模型的破产上界进行了比较。 相似文献
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本文考虑变保费风险模型,假设保费率是随时间变化的,研究了其Gerber-Shiu惩罚函数.通过无穷小方法给出 Gerber-Shiu惩罚函数所满足的积分一微分方程;在指数索赔下,给出其破产时赤字的数学期望及破产时的拉普拉斯变换. 相似文献
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Guo-jingWang Chun-shengZhang RongWu 《应用数学学报(英文版)》2003,19(1):59-70
In this paper we consider the risk process that is described by a piecewise deterministic Markov processes(PDMP).We first present the construction of the risk process and them discuss some ruin problems for this new kind of risk model. 相似文献
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In this paper, we study a discrete time risk model with random interest rate. The convergence of the discounted surplus process is proved by using martingale techniques, an expression of ruin probability is obtained, and bounds for ruin probability are included. In the second part of the paper, the distribution of surplus immediately after ruin, the distribution of surplus just before ruin, the joint distribution of the surplus immediately before and after ruin, and the distribution of ruin time are discussed. 相似文献
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This article deals with the ruin probability in a Sparre Andersen risk process with the inter-claim times being Erlang distributed in the framework of piecewise deterministic Markov process (PDMP). We construct an exponential martingale by virtue of the extended generator of the PDMP to change the measure. Some results are derived for the ruin probabilities, such as the general expressions for ruin probability, Lundberg bounds, Cramér-Lundberg approximations, and finite-horizon ruin probability. 相似文献
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Jing-min He Rong Wu Hua-yue Zhang 《应用数学学报(英文版)》2008,24(1):117-128
In this paper we mainly study the ruin probability of a surplus process described by a piecewise deterministic Markov process (PDMP). An integro-differential equation for the ruin probability is derived. Under a certain assumption, it can be transformed into the ruin probability of a risk process whose premiums depend on the current reserves. Using the same argument as that in Asmussen and Nielsen, the ruin probability and its upper bounds are obtained. Finally, we give an analytic expression for ruin probability and its upper bounds when the claim-size is exponentially distributed. 相似文献
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Hanspeter Schmidli 《Insurance: Mathematics and Economics》2010,46(2):281-289
A risk process that can be Markovised is conditioned on ruin. We prove that the process remains a Markov process. If the risk process is a PDMP, it is shown that the conditioned process remains a PDMP. For many examples the asymptotics of the parameters in both the light-tailed case and the heavy-tailed case are discussed. 相似文献
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Guo-jingWang Su-pingQian RongWu 《应用数学学报(英文版)》2003,19(3):521-528
In this paper we consider the risk process described by a piecewise deterministic Markov processes(PDMP). We mainly discuss the distribution of the deficit at ruin for the risk process. We derive the integrodifferential equation satisfied by this distribution. We obtain the explicit expressions for it for certain choices of the claim amount distribution. 相似文献
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本文推广了Centeno[1],何树红[2],张茂军[3]的模型,研究带干扰的常利率超额再保险风险模型。首先用鞅方法求得其调节函数,进而证明Lundberg不等式,给出有限时间破产概率上界,并讨论最优自留额的确定。 相似文献
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本文讨论了已推广的保险公司的崩溃模型.本文得到了离散时间的崩溃模型复利情形下的崩溃概率公式,也得出了连续时间的崩溃模型崩溃概率的明确解和Vokterra积分方程.这些结果推广了经典崩溃模型中的相应结果. 相似文献