Weighted envelope estimation to handle variability in model selection

D. J. Eck, R. D. Cook

Research output: Contribution to journalArticle

Abstract

Envelope methodology can provide substantial efficiency gains in multivariate statistical problems, but in some applications the estimation of the envelope dimension can induce selection volatility that may mitigate those gains. Current envelope methodology does not account for the added variance that can result from this selection. In this article, we circumvent dimension selection volatility through the development of a weighted envelope estimator. Theoretical justification is given for our estimator, and the validity of the residual bootstrap for estimating its asymptotic variance is established. A simulation study and real-data analysis illustrate the utility of our weighted envelope estimator.

Original languageEnglish (US)
Pages (from-to)743-749
Number of pages7
JournalBiometrika
Volume104
Issue number3
DOIs
StatePublished - Sep 1 2017
Externally publishedYes

Keywords

  • Dimension reduction
  • Envelope model
  • Model selection
  • Residual bootstrap
  • Variance reduction

ASJC Scopus subject areas

  • Statistics and Probability
  • Mathematics(all)
  • Agricultural and Biological Sciences (miscellaneous)
  • Agricultural and Biological Sciences(all)
  • Statistics, Probability and Uncertainty
  • Applied Mathematics

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