In Nonparametric and High-Dimensional Models, Bayesian Ignorability is an Informative Prior
In Nonparametric and High-Dimensional Models, Bayesian Ignorability is an Informative Prior
复制标题
在非参数和高维模型中,贝叶斯可忽略性是一个信息丰富的先验
DOI:
10.1080/01621459.2023.2278202
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发表时间:
2023
影响因子:
3.7
通讯作者:
Linero, Antonio R.
中科院分区:
文献类型:
--
作者:
Linero, Antonio R.
In problems with large amounts of missing data one must model two distinct data generating processes: the outcome process, which generates the response, and the missing data mechanism, which determines the data we observe. Under theignorabilitycondition of Rubin, however, likelihood-based inference for the outcome process does not depend on the missing data mechanism so that only the former needs to be estimated; partially because of this simplification, ignorability is often used as a baseline assumption. We study the implications of Bayesian ignorability in the presence of high-dimensional nuisance parameters and argue that ignorability is typically incompatible with sensible prior beliefs about the amount of confounding bias. We show that, for many problems, ignorability directly implies that the prior on the selection bias is tightly concentrated around zero. This is demonstrated on several models of practical interest, and the effect of ignorability on the posterior distribution is characterized for high-dimensional linear models with a ridge regression prior. We then show both how to build high-dimensional models that encode sensible beliefs about the confounding bias and also show that under certain narrow circumstances ignorability is less problematic. Supplementary materials for this article are available online.
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DOI:
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发表时间:
2011
期刊:
影响因子:
--
作者:
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通讯作者:
M. Debbah
DOI:
10.1098/rsta.2022.0153
发表时间:
2023
期刊:
Physical and Engineering Sciences
影响因子:
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DOI:
10.1056/nejmsr1203730
发表时间:
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期刊:
The New England journal of medicine
影响因子:
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作者:
Little RJ;D'Agostino R;Cohen ML;Dickersin K;Emerson SS;Farrar JT;Frangakis C;Hogan JW;Molenberghs G;Murphy SA;Neaton JD;Rotnitzky A;Scharfstein D;Shih WJ;Siegel JP;Stern H
通讯作者:
Stern H
影响因子:
4.5
作者:
Ray, Kolyan;van der Vaart, Aad
通讯作者:
van der Vaart, Aad
DOI:
--
发表时间:
2021
期刊:
Rational Rules
影响因子:
--
作者:
Shaun Nichols
通讯作者:
Shaun Nichols