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arXiv 2102.01753stat.ME
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基于回归秩得分的异质性分位数处理效应的去偏推断

Debiased Inference on Heterogeneous Quantile Treatment Effects with Regression Rank-Scores

Alexander Giessing, Jingshen Wang

AI总结:

本文提出一种结合 $\ell_1$-惩罚回归调整与秩得分偏差校正的新方法,用于高维协变量下异质性分位数处理效应的去偏推断,并通过模拟和英国生物银行数据验证其有效性。

摘要:

理解处理效应异质性对许多科学领域至关重要,因为同一处理可能对不同个体产生不同影响。分位数回归为建模此类异质性提供了一个自然的框架。我们提出一种在存在高维协变量情况下对异质性分位数处理效应进行推断的新方法。我们的估计量将 $\ell_1$-惩罚回归调整与基于秩得分的分位数特定偏差校正方案相结合。我们研究了该估计量的理论性质,包括估计的异质性分位数处理效应过程的弱收敛性和半参数有效性。我们通过模拟和一个实证例子展示了该方法在有限样本下的表现,该例子研究了使用他汀类药物对参与英国生物银行研究的阿尔茨海默病患者降低低密度脂蛋白胆固醇水平的差异化效应。

英文摘要:

Understanding treatment effect heterogeneity is vital to many scientific fields because the same treatment may affect different individuals differently. Quantile regression provides a natural framework for modeling such heterogeneity. We propose a new method for inference on heterogeneous quantile treatment effects in the presence of high-dimensional covariates. Our estimator combines an $\ell_1$-penalized regression adjustment with a quantile-specific bias correction scheme based on rank scores. We study the theoretical properties of this estimator, including weak convergence and semiparametric efficiency of the estimated heterogeneous quantile treatment effect process. We illustrate the finite-sample performance of our approach through simulations and an empirical example, dealing with the differential effect of statin usage for lowering low-density lipoprotein cholesterol levels for the Alzheimer's disease patients who participated in the UK Biobank study.

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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