arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2006.05617stat.AP
收藏

基于混合树的保险索赔模型

Hybrid Tree-based Models for Insurance Claims

Zhiyu Quan, Zhiguo Wang, Guojun Gan, Emiliano A. Valdez

摘要:

两部分模型和Tweedie广义线性模型(GLM)已被用于短期保险合同的损失成本建模。对于大多数保险索赔组合,通常存在大比例的零索赔,这导致不平衡,从而导致这些传统方法的预测准确性较差。本文提出使用具有混合结构的基于树的模型,其中涉及两步算法作为这些传统模型的替代方法。第一步是构建分类树,以构建频率的概率模型。在第二步中,我们使用弹性网回归模型在每个终端节点的分类树,建立严重性的分布模型。这种混合结构在算法的每一步都可以获得调整超参数的好处;这可以提高预测精度,并可以进行调整以满足特定的业务目标。我们研究和比较这种混合的基于树的结构的预测性能与传统的Tweedie模型使用真实和合成数据集。我们的实证结果表明,这些混合基于树的模型产生更准确的预测,而不会失去直观的解释。

英文摘要:

Two-part models and Tweedie generalized linear models (GLMs) have been used to model loss costs for short-term insurance contract. For most portfolios of insurance claims, there is typically a large proportion of zero claims that leads to imbalances resulting in inferior prediction accuracy of these traditional approaches. This article proposes the use of tree-based models with a hybrid structure that involves a two-step algorithm as an alternative approach to these traditional models. The first step is the construction of a classification tree to build the probability model for frequency. In the second step, we employ elastic net regression models at each terminal node from the classification tree to build the distribution model for severity. This hybrid structure captures the benefits of tuning hyperparameters at each step of the algorithm; this allows for improved prediction accuracy and tuning can be performed to meet specific business objectives. We examine and compare the predictive performance of such a hybrid tree-based structure in relation to the traditional Tweedie model using both real and synthetic datasets. Our empirical results show that these hybrid tree-based models produce more accurate predictions without the loss of intuitive interpretation.

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。

↑