arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.10933stat.MEstat.AP
收藏

使用混合效应随机森林的灵活域预测

Flexible domain prediction using mixed effects random forests

Patrick Krennmair, Timo Schmid

AI总结:

针对小区域样本量不足下的空间指标估计问题,提出基于混合效应随机森林的小区域均值估计框架及非参数bootstrap不确定性估计方法,经数据验证和仿真对比,效果优于传统回归方法。

摘要:

本文推广将随机森林作为通用工具,用于在小区域特定样本量不足的情况下估计空间分解指标。小区域估计量主要在回归框架下构建,依赖线性混合模型来处理调查数据的层级结构。相比之下,机器学习方法提供了非线性、非参数的替代方案,兼具出色的预测性能与更低的模型误设风险。混合效应随机森林结合了回归森林的优势与层级依赖关系建模能力。本文提出了一个基于混合效应随机森林的连贯框架用于估计小区域均值,并提出一种非参数bootstrap估计量来评估估计的不确定性。我们利用墨西哥新莱昂州的收入数据说明了所提方法的优势。最后,通过基于模型和基于设计的仿真实验,将所提方法与传统基于回归的小区域均值估计方法进行了对比,以此评估该方法的性能。

英文摘要:

This paper promotes the use of random forests as versatile tools for estimating spatially disaggregated indicators in the presence of small area-specific sample sizes. Small area estimators are predominantly conceptualized within the regression-setting and rely on linear mixed models to account for the hierarchical structure of the survey data. In contrast, machine learning methods offer non-linear and non-parametric alternatives, combining excellent predictive performance and a reduced risk of model-misspecification. Mixed effects random forests combine advantages of regression forests with the ability to model hierarchical dependencies. This paper provides a coherent framework based on mixed effects random forests for estimating small area averages and proposes a non-parametric bootstrap estimator for assessing the uncertainty of the estimates. We illustrate advantages of our proposed methodology using Mexican income-data from the state Nuevo León. Finally, the methodology is evaluated in model-based and design-based simulations comparing the proposed methodology to traditional regression-based approaches for estimating small area averages.

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。

↑