Consistent group identification and variable selection in regression with correlated predictors

Dhruv B. Sharma, Howard D. Bondell, Hao Helen Zhang

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Statistical procedures for variable selection have become integral elements in any analysis. Successful procedures are characterized by high predictive accuracy, yielding interpretable models while retaining computational efficiency. Penalized methods that perform coefficient shrinkage have been shown to be successful in many cases. Models with correlated predictors are particularly challenging to tackle. We propose a penalization procedure that performs variable selection while clustering groups of predictors automatically. The oracle properties of this procedure, including consistency in group identification, are also studied. The proposed method compares favorably with existing selection approaches in both prediction accuracy and model discovery, while retaining its computational efficiency. Supplementary materials are available online.

Original languageEnglish (US)
Pages (from-to)319-340
Number of pages22
JournalJournal of Computational and Graphical Statistics
Issue number2
StatePublished - 2013


  • Coefficient shrinkage
  • Correlation
  • Oracle properties
  • Penalization
  • Structure identification
  • Supervised clustering

ASJC Scopus subject areas

  • Statistics and Probability
  • Discrete Mathematics and Combinatorics
  • Statistics, Probability and Uncertainty


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