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arXiv 0904.4074q-fin.RMq-fin.CP
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动态操作风险:模型依赖性和结合不同的信息来源

Dynamic operational risk: modeling dependence and combining different sources of information

Gareth W. Peters, Pavel V. Shevchenko, Mario V. Wüthrich

摘要:

在本文中,我们模型之间的依赖性操作风险,允许风险配置文件演变随机的时间和依赖。这允许灵活的相关性结构,其中可以对不同风险类别的频率之间和不同风险类别的严重性之间以及风险类别内的依赖性进行建模。该模型使用贝叶斯推断方法进行估计,允许在估计过程中结合内部数据、外部数据和专家意见。我们使用一个专门的马尔可夫链蒙特卡罗模拟方法,称为切片采样,从所得的后验分布中获得样本,并估计模型参数。

英文摘要:

In this paper, we model dependence between operational risks by allowing risk profiles to evolve stochastically in time and to be dependent. This allows for a flexible correlation structure where the dependence between frequencies of different risk categories and between severities of different risk categories as well as within risk categories can be modeled. The model is estimated using Bayesian inference methodology, allowing for combination of internal data, external data and expert opinion in the estimation procedure. We use a specialized Markov chain Monte Carlo simulation methodology known as Slice sampling to obtain samples from the resulting posterior distribution and estimate the model parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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