A sequence of improvements over the James-Stein estimator
In this article, we consider the problem of estimating a p-variate (p >= 3) normal mean vector in a decision-theoretic setup. Using a simple property of the noncentral chi-square distribution, we have produced a sequence of smooth estimators dominating the James-Stein estimator and each improved estimator is better than the previous one. It is also shown by using a technique of [5]. J. Multivariate Anal.36 121-126) that our smooth estimators can be dominated by non-smooth estimators.
Year of publication: |
1992
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Authors: | Guo, Ying (Ingrid) Yueh ; Pal, Nabendu |
Published in: |
Journal of Multivariate Analysis. - Elsevier, ISSN 0047-259X. - Vol. 42.1992, 2, p. 302-317
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Publisher: |
Elsevier |
Keywords: | James-Stein estimator quadratic loss function risk function inadmissibility |
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