Efficient estimation of weighted treatment effects under two-phase sampling
两阶段抽样下加权处理效应的有效估计AI 解读 ↓
本页整理公开书目信息,不生成学术质量评分。AI 解读根据题名及所注明的摘要或原文片段生成,未完成全文核验,可能有误;具体假设、证明与结论请核对原文。摘要保留来源文本,未经模型改写。
DOI 首次登记不等于接收或发表日期。部分更正、评论等条目没有独立摘要;缺少可靠材料时保留待补状态。
本页为预印本版本;arXiv 收录、作者填写的期刊信息以及作者既有发表经历,都不单独证明本篇已接收。作者发表记录按 OpenAlex 身份与完整姓名、本站覆盖期刊 ISSN 及正式卷期核对,只展示已核实例,档案仍可能误合并。
引用量采用 OpenAlex 单条关联记录,不合计多个记录;关联记录可能包含正式发表版本,不等于此版本单独引用。缺失不视为零,引用指标不代表论文质量。
关注作者按书目中的完整姓名匹配,同名和姓名变体需人工辨别。相关论文先按共享细分方向和具体方法排列,再参考通用方法与发表日期。
AI 根据所提供的论文材料归类:摘要直接研究观察性因果研究中的倾向得分加权处理效应、双重稳健估计与效率界,明确对应因果推断方向。
两阶段抽样下加权处理效应的有效估计AI 解读 ↓
正在核对关联版本…
正在核对对应版本的资源…
Two-phase sampling offers a practical way to collect costly confounders only in a subsample while retaining inexpensive information for a larger cohort. In observational causal studies, however, phase-2 selection can distort estimation of population causal effects if the sampling mechanism is ignored, and available phase-1 information may also be exploited to improve efficiency. Yet efficiency theory for causal estimands under such designs remains limited, particularly beyond the average treatment effect. In this paper, we derive the semiparametric efficiency bound for a class of propensity-score-weighted average treatment effects, which includes the average treatment effect, effects among treated and untreated populations, and the overlap effect, under two-phase sampling. In addition to straightforward weighting estimators based on the known sampling probabilities, we propose an enriched doubly robust estimator that attains the efficiency bound when all nuisance functions are consistently estimated. In particular, under outcome-dependent sampling, substantial efficiency gains can arise in some settings by appropriately incorporating phase-1 information. We further conduct extensive simulation studies, varying the choice of phase-1 variables and sampling schemes, to characterize when and to what extent leveraging phase-1 information leads to efficiency gains.