On Bayesian robust regression with diverging number of predictors
On Bayesian robust regression with diverging number of predictors
复制标题
关于预测变量数量不同的贝叶斯稳健回归
DOI:
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复制
发表时间:
2015
期刊:
影响因子:
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通讯作者:
Y. Ritov
中科院分区:
文献类型:
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作者:
D. Nevo;Y. Ritov
This paper concerns the robust regression model when the number of predictors and the number of observations grow in a similar rate. Theory for M-estimators in this regime has been recently developed by several authors [El Karoui et al., 2013, Bean et al., 2013, Donoho and Montanari, 2013].
Motivated by the inability of M-estimators to successfully estimate the Euclidean norm of the coefficient vector, we consider a Bayesian framework for this model. We suggest a two-component mixture of normals prior for the coefficients and develop a Gibbs sampler procedure for sampling from relevant posterior distributions, while utilizing a scale mixture of normal representation for the error distribution . Unlike M-estimators, the proposed Bayes estimator is consistent in the Euclidean norm sense. Simulation results demonstrate the superiority of the Bayes estimator over traditional estimation methods.
影响因子:
1.4
作者:
E. George;R. McCulloch
通讯作者:
E. George;R. McCulloch