The Loss Rank Criterion for Variable Selection in Linear Regression Analysis

Details The Loss Rank Criterion for Variable Selection in Linear Regression Analysis The Loss Rank Criterion for Variable Selection in Linear Regression Analysis

2010-11-05

arxiv.org/abs/1011.1373v1

Statistics

Methodology

18 pages, 1 figure

Scientific paper

Lasso and other regularization procedures are attractive methods for variable selection, subject to a proper choice of shrinkage parameter. Given a set of potential subsets produced by a regularization algorithm, a consistent model selection criterion is proposed to select the best one among this preselected set. The approach leads to a fast and efficient procedure for variable selection, especially in high-dimensional settings. Model selection consistency of the suggested criterion is proven when the number of covariates d is fixed. Simulation studies suggest that the criterion still enjoys model selection consistency when d is much larger than the sample size. The simulations also show that our approach for variable selection works surprisingly well in comparison with existing competitors. The method is also applied to a real data set.

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