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AI 根据所提供的论文材料归类:摘要明确研究目标总体的处理效应异质性、效应修饰、双重稳健估计及跨来源因果信息迁移。

反馈分类问题

A New Targeted-Federated Learning Framework for Estimating Heterogeneity of Treatment Effects: A Robust Framework with Applications in Aging Cohorts

估计处理效应异质性的目标联邦学习框架:稳健方法与老龄队列应用

正在核对关联版本…

代码、数据与补充材料

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关注这篇论文的作者
Rong Zhao
Jason Falvey
Xu Shi
Chixiang Chen

估计处理效应异质性的目标联邦学习框架:稳健方法与老龄队列应用

研究问题
多个数据源总体异质且不能共享原始数据时,如何估计目标总体中的处理效应异质性,并避免不可迁移来源影响汇总?
方法与思路
作者定义投影型异质性目标,在联邦框架中调整协变量分布变化,并设计通信高效的自助法程序筛选不可迁移来源。
材料陈述的贡献
摘要称,方法具有双重稳健性,支持连续结果的差值效应和二元结果的优势比效应,并通过模拟及医保关联数据展示。
阅读关注点
应核对投影目标的解释、双重稳健性对应的模型组合、来源可迁移条件,以及筛选步骤对偏误和推断的影响。
阅读边界
这是 arXiv 预印本,同行评审及期刊接收未核实;摘要未说明完整稳健性条件,模拟中较好表现不能证明普遍优越。

原文摘要

Analyzing data from multiple sources offers valuable opportunities to improve the estimation efficiency of causal estimands. However, this analysis also poses many challenges due to population heterogeneity and data privacy constraints. While several advanced methods for causal inference in federated settings have been developed in recent years, many focus on difference-based averaged causal effects and are not designed to study effect modification. In this study, we introduce a novel targeted-federated learning framework to study the heterogeneity of treatment effects (HTEs) for a targeted population by proposing a projection-based estimand. This HTE framework integrates information from multiple data sources without sharing raw data, while accounting for covariate distribution shifts among sources. Our proposed approach is shown to be doubly robust, conveniently supporting both difference-based estimands for continuous outcomes and odds ratio-based estimands for binary outcomes. Furthermore, we develop a communication-efficient bootstrap-based selection procedure to detect non-transportable data sources, thereby enhancing robust information aggregation without introducing bias. The superior performance of the proposed estimator over existing methods is demonstrated through extensive simulation studies, and the utility of our approach has been shown in a real-world data application using nationwide Medicare-linked data.

笔记与分组
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