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March, 1986 Minimax Multiple Shrinkage Estimation
Edward I. George
Ann. Statist. 14(1): 188-205 (March, 1986). DOI: 10.1214/aos/1176349849


For the canonical problem of estimating a multivariate normal mean under squared-error-loss, this article addresses the problem of selecting a minimax shrinkage estimator when vague or conflicting prior information suggests that more than one estimator from a broad class might be effective. For this situation a new class of alternative estimators, called multiple shrinkage estimators, is proposed. These estimators use the data to emulate the behavior and risk properties of the most effective estimator under consideration. Unbiased estimates of risk and sufficient conditions for minimaxity are provided. Bayesian motivations link this construction to posterior means of mixture priors. To illustrate the theory, minimax multiple shrinkage Stein estimators are constructed which can adaptively shrink the data towards any number of points or subspaces.


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Edward I. George. "Minimax Multiple Shrinkage Estimation." Ann. Statist. 14 (1) 188 - 205, March, 1986.


Published: March, 1986
First available in Project Euclid: 12 April 2007

zbMATH: 0602.62041
MathSciNet: MR829562
Digital Object Identifier: 10.1214/aos/1176349849

Primary: 62F10
Secondary: 62F15

Rights: Copyright © 1986 Institute of Mathematical Statistics


Vol.14 • No. 1 • March, 1986
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