Report
OA Policy
English

Robust VIF Regression

PublisherMontreal, CA
Collection
  • Cahiers du GERAD
Publication date2011
Abstract

The sophisticated and automated means of data collection used by an increasing number of institutions and companies leads to extremely large datasets. Subset selection in regression is essential when a huge number of covariates can potentially explain a response variable of interest. The recent statistical literature has seen an emergence of new selection methods that provide some type of compromise between implementation (computational speed) and statistical optimality (e.g. prediction error minimization). Global methods such as Mallows' Cp have been supplanted by sequential methods such as stepwise regression. More recently, streamwise regression, faster than the former, has emerged. A recently proposed streamwise regression approach based on the variance inflation factor (VIF) is promising but its least-squares based implementation makes it susceptible to the outliers inevitable in such large data sets. This lack of robustness can lead to poor and suboptimal feature selection. This article proposes a robust VIF regression, based on fast robust estimators, that inherits all the good properties of classical VIF in the absence of outliers, but also continues to perform well in their presence where the classical approach fails. The analysis of two real data sets shows the necessity of a robust approach for policy makers.

Keywords
  • Variable selection
  • Linear regression
  • Multicollinearity
  • M-estimator
Citation (ISO format)
DUPUIS, Debbie, VICTORIA-FESER, Maria-Pia. Robust VIF Regression. 2011
Main files (1)
Report
accessLevelPublic
Identifiers
  • PID : unige:17814
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249downloads

Technical informations

Creation03/11/2011 15:54:00
First validation03/11/2011 15:54:00
Update time14/03/2023 18:05:49
Status update14/03/2023 18:05:49
Last indexation29/10/2024 19:44:02
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