Higher-Order Least Squares: Assessing Partial Goodness of Fit of Linear Causal Models

被引:2
|
作者
Schultheiss, Christoph [1 ]
Buhlmann, Peter [1 ]
Yuan, Ming [2 ]
机构
[1] Swiss Fed Inst Technol, Seminar Stat, Zurich, Switzerland
[2] Columbia Univ, Dept Stat, New York, NY USA
基金
欧洲研究理事会;
关键词
Causal inference; Latent confounding; Model misspecification; Nodewise regression; Structural equation models; INFERENCE; IDENTIFICATION; DISCOVERY; TESTS;
D O I
10.1080/01621459.2022.2157728
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
We introduce a simple diagnostic test for assessing the overall or partial goodness of fit of a linear causal model with errors being independent of the covariates. In particular, we consider situations where hidden confounding is potentially present. We develop a method and discuss its capability to distinguish between covariates that are confounded with the response by latent variables and those that are not. Thus, we provide a test and methodology for partial goodness of fit. The test is based on comparing a novel higher-order least squares principle with ordinary least squares. In spite of its simplicity, the proposed method is extremely general and is also proven to be valid for high-dimensional settings. for this article are available online.
引用
收藏
页码:1019 / 1031
页数:13
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