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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.
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页码:1019 / 1031
页数:13
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