On the residual empirical process based on the ALASSO in high dimensions and its functional oracle property

A. Chatterjee, S. Gupta and S.N. Lahiri

Journal of Econometrics, 2015, vol. 186, issue 2, 317-324

Abstract: This paper considers post variable-selection inference in a high dimensional penalized regression model based on the ALASSO method of Zou (2006). It is shown that under suitable sparsity conditions, the residual empirical process based on the ALASSO provides valid inference methodology in very high dimensional regression problems where conventional methods fail. It is also shown that the ALASSO based residual empirical process satisfies a functional oracle property, i.e., in addition to selecting the set of relevant variables with probability tending to one, the ALASSO based residual empirical process converges to the same limiting Gaussian process as the OLS based residual empirical process under the oracle. The functional oracle property is critically exploited to construct asymptotically valid confidence bands for the error distribution function and prediction intervals for unobserved values of the response variable in the high dimensional set up, where traditional non-penalized methods are known to fail. Simulation results are presented illustrating finite sample performance of the proposed methodology.

Keywords: Asymptotic uniform linearity; Brownian bridge; Oracle property; Prediction intervals; Regularization; Weak convergence (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:econom:v:186:y:2015:i:2:p:317-324

DOI: 10.1016/j.jeconom.2015.02.012

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