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arXiv 0802.4060math.PR
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二维风险过程从象限的退出问题:精确和渐近结果

Exit problem of a two-dimensional risk process from the quadrant: Exact and asymptotic results

Florin Avram, Zbigniew Palmowski, Martijn R. Pistorius

摘要:

考虑两家保险公司(或同一家公司的两家分支机构),它们按照一定的比例分配索赔和保费。我们根据更新过程对索赔的发生进行建模。一个破产问题被认为是相应的二维风险过程首先离开正象限,另一个是进入负象限。当索赔按泊松过程到达时,我们得到了最终破产概率的封闭形式表达式。在一般情形下,在索赔额分布为Cramér轻尾假设下,分析了当两个公司的初始准备金趋于无穷大时破产概率的渐近性.

英文摘要:

Consider two insurance companies (or two branches of the same company) that divide between them both claims and premia in some specified proportions. We model the occurrence of claims according to a renewal process. One ruin problem considered is that of the corresponding two-dimensional risk process first leaving the positive quadrant; another is that of entering the negative quadrant. When the claims arrive according to a Poisson process, we obtain a closed form expression for the ultimate ruin probability. In the general case, we analyze the asymptotics of the ruin probability when the initial reserves of both companies tend to infinity under a Cramér light-tail assumption on the claim size distribution.

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