Electronic Journal of Statistics

On Bayesian robust regression with diverging number of predictors

Abstract

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.

Article information

Source
Electron. J. Statist., Volume 10, Number 2 (2016), 3045-3062.

Dates
First available in Project Euclid: 9 November 2016

https://projecteuclid.org/euclid.ejs/1478660516

Digital Object Identifier
doi:10.1214/16-EJS1205

Mathematical Reviews number (MathSciNet)
MR3571962

Zentralblatt MATH identifier
1366.62139

Citation

Nevo, Daniel; Ritov, Ya’acov. On Bayesian robust regression with diverging number of predictors. Electron. J. Statist. 10 (2016), no. 2, 3045--3062. doi:10.1214/16-EJS1205. https://projecteuclid.org/euclid.ejs/1478660516

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