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arXiv 2112.03075stat.MEecon.EMq-fin.ST
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深度分位数和深度复合模型回归

Deep Quantile and Deep Composite Model Regression

Tobias Fissler, Michael Merz, Mario V. Wüthrich

摘要:

精算索赔额建模的一个主要困难是,没有一个简单的现成的分布,同时提供了一个良好的分布模型的主体和尾部的数据。特别是,协变量对于小索赔额和大索赔额可能有不同的影响。为了解决这个问题,我们引入了一个深度复合回归模型,其拼接点是根据条件索赔额分布的分位数而不是常数给出的。为了便于M-估计这样的模型,我们介绍和严格一致的评分函数组成的三分位数,以及下和上超出该分位数的预期不足的类的特征。在第二步中,将此启发性结果应用于拟合深度神经网络回归模型。我们证明了我们的方法的适用性和它的优越性,在一个真正的意外保险数据集上的经典方法。

英文摘要:

A main difficulty in actuarial claim size modeling is that there is no simple off-the-shelf distribution that simultaneously provides a good distributional model for the main body and the tail of the data. In particular, covariates may have different effects for small and for large claim sizes. To cope with this problem, we introduce a deep composite regression model whose splicing point is given in terms of a quantile of the conditional claim size distribution rather than a constant. To facilitate M-estimation for such models, we introduce and characterize the class of strictly consistent scoring functions for the triplet consisting a quantile, as well as the lower and upper expected shortfall beyond that quantile. In a second step, this elicitability result is applied to fit deep neural network regression models. We demonstrate the applicability of our approach and its superiority over classical approaches on a real accident insurance data set.

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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