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Generalized Cross-Validation as a Method for Choosing a Good Ridge Parameter

Golub, Gene H., Heath, Michael, Wahba, Grace·1979·Technometrics

Abstract

Consider the ridge estimate (λ) for β in the model unknown, (λ) = (X T X + nλI)−1 X T y. We study the method of generalized cross-validation (GCV) for choosing a good value for λ from the data. The estimate is the minimizer of V(λ) given by where A(λ) = X(X T X + nλI)−1 X T . This estimate is a rotation-invariant version of Allen's PRESS, or ordinary cross-validation. This estimate behaves like a risk improvement estimator, but does not require an estimate of σ2, so can be used when n − p is small, or even if p ≥ 2 n in certain cases. The GCV method can also be used in subset selection and singular value truncation methods for regression, and even to choose from among mixtures of these methods.

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Metadata

Authors
Golub, G. H., Heath, M., & Wahba, G.
Venue
Technometrics
Published
1979-05
Volume
21
Issue
2
Pages
215-223
ISSN
  • 0040-1706 (ISSN-L)
  • 1537-2723
OpenAlex
W1990381576
Cited by
3,934
References
6
FWCI
19.28
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Generalized Cross-Validation as a Method for Choosing a Good Ridge Parameter. https://app.cochat.ai/papers/10.1080/00401706.1979.10489751
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Golub, G. H., Heath, M., & Wahba, G. (1979). Generalized Cross-Validation as a Method for Choosing a Good Ridge Parameter. Technometrics. https://doi.org/10.1080/00401706.1979.10489751

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