带干扰风险的破产模型的研究

本文对古典风险模型中保险公司按单位时间常数率收到保险费的假设做了改进,将每次收到的保险费的次数看作是复合泊松过程,将每次收到的保费和每次的理陪额均看作是服从指数分布的随机变量,并引入带干扰风险的扰动项,从而对古典风险模型进行推广,且给出了相应的破产概率上界,分析了破产概率的上界与准备金,索赔额,净保费和扰动方差之间的关系.     

一类带干扰索赔相关风险模型的破产概率

讨论一类带干扰索赔相关且保费收取为一复合泊松过程风险模型的破产问题，利用鞅方法得出Lundberg不等式和最终破产概率公式。     

常利率环境下带干扰风险模型的破产估计

本文中，我们研究具有固定收益率或利率的带干扰的复合泊瓦松风险模型的破产概率，给出破产概率估计，及上下界。     

风险理论中破产模型的若干结果

本文分连续时间和离散时间两种情况对古典的破产模型做了改进和推广 ,并给出了统一的破产概率的表达式 .     

一类相依的双险种风险模型的破产问题

本文讨论了一类相关保险业务的风险过程,将相依索赔的风险过程转化为古典风险模型,得出最终破产概率的一般表达式.     

一类带扰动和附索赔风险模型的破产概率

本文研究带扰动和附索赔的风险模型.利用鞅方法,得到了破产概率的指数上界及精确表达式,推广了不带扰动的风险模型相应的结论.     

相关带干扰风险模型的破产概率

本文引进了含相关类带干扰经典风险过程, 研究类之间的相关性对破产概率的影响, 主要研究类之间的相关性对其Lundberg指数的大小关系的影响.     

变破产下限风险模型的破产概率

近年来,很多文献对经典风险模型作了研究,并得出许多有用的结论。一般文献都是假定保险公司的破产下限为零,但在实际的保险实务中,当保险公司的盈余低于某一限度时,保险公司就要调整政策或宣布破产。本文研究了经典风险模型在假定变破产下限下的破产概率,得出了破产概率所满足的不等式,而且研究了当破产下限f(t)为某些特殊函数时,破产概率所满足的不等式或破产概率的具体表达式。最后本文给出了在推广后的风险模型中变破产下限破产概率所满足的不等式。     

带干扰变破产限风险模型的破产概率

近年来,许多文献对经典风险模型及推广后的风险模型作了研究,并得出许多有用的结论.一般的文献都是假定保险公司的破产限为零.但在实际的保险业务中,当保险公司的盈余低于某一限度(破产限)时,保险公司就要调整政策或宣布破产.本文研究了带干扰的双Cox风险模型和带干扰的双Poisson风险模型在变破产限下的破产概率,得出了破产概率所满足的不等式,而且研究了当破产限为某一特殊函数时,破产概率所满足的不等式和具体的解析式.     

调整保险费率模型下的破产概率

本文主要讨论当保险费率按公司的盈余进行适当的调整时,如何求破产概率的问题．     

带干扰的一类相依风险模型

本文将古典风险模型推广为带干扰的一类相依风险模型。在此风险模型中,保单到达过程为一Pois-son过程,而索赔到达过程为保单到达过程的P-稀疏过程。利用鞅的方法得到了破产概率和Lundberg不等式。     

Ruin theory for classical risk process that is perturbed by diffusion with risky investments

In this paper, we study the ruin theory for classical risk process that is perturbed by diffusion with risky investments. We obtain the upper bound for the minimal ruin probability. We also investigate the relationships between the adjustment coefficient and the diffusion volatility parameter, the risk‐free rate and the correlation coefficient by numerical calculation. We give the relationships between ruin and investment. Copyright © 2008 John Wiley & Sons, Ltd.     

带扩散扰动项的广义双Poisson风险模型下的破产概率

本文首先在[1]-[4]讨论的基础上,将经典的破产模型推广到带扩散扰动项的广义双Po isson风险模型,即将保费收取过程和索赔总额过程同时推广到广义复合Po isson过程,以此解决在同一时刻有两张以上保单到达和两个以上顾客索赔的实际问题;接着运用鞅方法证明了破产概率满足的Lundberg不等式和一般公式在我们所建的模型下同样成立.     

Asymptotic ruin probabilities in a generalized bidimensional risk model perturbed by diffusion with constant force of interest

In the paper, we study three types of finite-time ruin probabilities in a diffusion-perturbed bidimensional risk model with constant force of interest, pairwise strongly quasi-asymptotically independent claims and two general claim arrival processes, and obtain uniformly asymptotic formulas for times in a finite interval when the claims are both long-tailed and dominatedly-varying-tailed. In particular, with a certain dependence structure among the inter-arrival times, these formulas hold uniformly for all times when the claims are pairwise quasi-asymptotically independent and consistently-varying-tailed.     

一类带干扰风险过程的破产概率的估计

In this paper,a class of risk processes perturbed by diffusion are considered. The Lundberg inequalities for the ruin probability are obtained. The size of the Lundberg exponents for different kinds of risk model is compared. The numerical illustration for the impact of the parameters on the ruin probability is given.     

Survival probability and ruin probability of a risk model

In this paper, a new risk model is studied in which the rate of premium income is regarded as a random variable, the arrival of insurance policies is a Poisson process and the process of claim occurring is p-thinning process. The integral representations of the survival probability are gotten. The explicit formula of the survival probability on the infinite interval is obtained in the special casc cxponential distribution.The Lundberg inequality and the common formula of the ruin probability are gotten in terms of some techniques from martingale theory.     

On the ruin probabilities of a bidimensional perturbed risk model

We follow some recent works to study the ruin probabilities of a bidimensional perturbed insurance risk model. For the case of light-tailed claims, using the martingale technique we obtain for the infinite-time ruin probability a Lundberg-type upper bound, which captures certain information of dependence between the two marginal surplus processes. For the case of heavy-tailed claims, we derive for the finite-time ruin probability an explicit asymptotic estimate.     

经典风险模型下带有随机利率的一类破产问题

考虑利率随机性通过标准布朗运动和普哇松过程来描述情形下的一类破产问题．利用鞅方法,得到了此情形下经典风险模型的Lundberg基本方程,并考虑了其解的两个有效应用,从而得到了破产概率、盈余首次到达某给定水平x（x〉u）的概率、f（x,y｜0）及初始盈余u=0情况下破产时单位赔付现值的表达式．最后给出了当个体理赔服从指数分布情形下的一些结果．     

EXPECTED DISCOUNTED PENALTY FUNCTION AT RUIN FOR RISK PROCESS PERTURBED BY DIFFUSION UNDER INTEREST FORCE

In this article, the risk process perturbed by diffusion under interest force is considered, the continuity and twice continuous differentiability for Фδ（u,w） are discussed,the Feller expression and the integro-differential equation satisfied by Фδ （u ,w） are derived. Finally, the decomposition of Фδ（u,w） is discussed, and some properties of each decomposed part of Фδ（u,w） are obtained. The results can be reduced to some ones in Gerber and Landry＇s,Tsai and Willmot＇s, and Wang＇s works by letting parameter δ and （or） a be zero.