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arXiv 1808.08982stat.AP
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汽车保险理赔预测

Combining Predictions of Auto Insurance Claims

Chenglong Ye, Lin Zhang, Mingxuan Han, Yanjia Yu, Bingxin Zhao, Yuhong Yang

摘要:

本文旨在通过组合候选预测来更好地预测高度偏斜的汽车保险索赔。我们分析了一个版本的袋鼠汽车保险公司的数据,并研究了结合不同的方法,使用五个预测精度的措施的影响。结果表明:首先,当候选人中有一个突出的(基尼指数)预测,“预测组合之谜”现象消失。简单的平均方法比更复杂的模型组合方法表现得更差,这表明组合不同的方法可以帮助我们避免性能下降。其次,预测准确性度量的选择对于定义“低频和高严重性”(LFHS)数据的最佳候选预测至关重要。例如,均方误差(MSE)不能很好地区分模型组合方法,因为值很接近。第三,不同的模型组合方法的性能可能会有很大差异。我们建议使用一种新的模型组合方法,命名为ARM-Tweedie,这样的LFHS数据,它受益于最佳的收敛速度,并表现出理想的性能在几个措施的袋鼠数据。第四,总体而言,模型组合方法提高了车险理赔费用的预测精度。特别是,自适应混合回归(ARM),ARM-Tweedie和约束线性回归可以提高预测性能时,只有弱学习者或不存在主导学习者。

英文摘要:

This paper aims to better predict highly skewed auto insurance claims by combining candidate predictions. We analyze a version of the Kangaroo Auto Insurance company data and study the effects of combining different methods using five measures of prediction accuracy. The results show the following. First, when there is an outstanding (in terms of Gini Index) prediction among the candidates, the "forecast combination puzzle" phenomenon disappears. The simple average method performs much worse than the more sophisticated model combination methods, indicating that combining different methods could help us avoid performance degradation. Second, the choice of the prediction accuracy measure is crucial in defining the best candidate prediction for "low frequency and high severity" (LFHS) data. For example, mean square error (MSE) does not distinguish well between model combination methods, as the values are close. Third, the performances of different model combination methods can differ drastically. We propose using a new model combination method, named ARM-Tweedie, for such LFHS data; it benefits from an optimal rate of convergence and exhibits a desirable performance in several measures for the Kangaroo data. Fourth, overall, model combination methods improve the prediction accuracy for auto insurance claim costs. In particular, Adaptive Regression by Mixing (ARM), ARM-Tweedie, and constrained Linear Regression can improve forecast performance when there are only weak learners or when no dominant learner exists.

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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