Stein–Haff identity for the exponential family
Author:
G. Alfelt
Journal:
Theor. Probability and Math. Statist. 99 (2019), 5-17
MSC (2010):
Primary 62H12; Secondary 62C99
DOI:
https://doi.org/10.1090/tpms/1076
Published electronically:
February 27, 2020
MathSciNet review:
3908652
Full-text PDF
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Additional Information
Abstract: In this paper, the Stein–Haff identity is established for positive-definite and symmetric random matrices belonging to the exponential family. The identity is then applied to the matrix-variate gamma distribution, and an estimator that dominates the maximum likelihood estimator in terms of Stein’s loss is obtained. Finally, a simulation study is conducted in order to support the theoretical results.
References
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References
- T. Bodnar and A. Gupta, An identity for multivariate elliptically contoured matrix distribution, Statistics & Probability Letters 79 (2009), 1327–1330. MR 2522604
- D. K. Dey and C. Srinivasan, Estimation of a covariance matrix under Stein’s loss, Ann. Statist. 13 (1985), 1581–1591. MR 811511
- T. S. Ferguson, Mathematical Statistics: A Decision Theoretic Approach, Academic Press, New York, 1967. MR 0215390
- A. K. Gupta and D. K. Nagar, Matrix Variate Distributions, CRC Press, 2000. MR 1738933
- L. R. Haff, An identity for the Wishart distribution with applications, J. Multivariate Anal. 9 (1979), 531–542. MR 556910
- D. Harville, Matrix Algebra from Statistician’s Perspective, Springer, New York, 1997. MR 1467237
- W. James and C. Stein, Estimation with quadratic loss, Proc. Fourth Berkeley Symp. Math. Statist. Prob., vol. 1, 1961, pp. 361–380. MR 0133191
- Y. Konno, Improving on the sample covariance matrix for a complex elliptically contoured distribution, Journal of Statistical Planning and Inference 7 (2007), 2475–2486. MR 2325450
- Y. Konno, Shrinkage estimators for large covariance matrices in multivariate real and complex normal distributions under an invariant quadratic loss, J. Multivariate Anal. 100 (2009), 2237–2253. MR 2560366
- T. Kubokawa, A revisit to estimation of the precision matrix of the Wishart distribution, J. Statist. Res. 39 (2005), 91–114. MR 2195210
- T. Kubokawa and M. Srivastava, Robust improvement in estimation of a covariance matrix in an elliptically contoured distribution, Ann. Statist. 27 (1999), 600–609. MR 1714715
- T. Kubokawa and M. Srivastava, Estimation of the precision matrix of a singular Wishart distribution and its application in high dimensional data, J. Multivariate Anal. 99 (2008), 1906–1928. MR 2466543
- R. J. Muirhead, Aspects of multivariate statistical theory, Wiley, New York, 1982. MR 652932
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- H. Tsukuma, Improvement on the best invariant estimators of the normal covariance and precision matrices via a lower triangular subgroup, J. Japan Statist. Soc. 44 (2014), 195–218. MR 3379071
- H. Van der Vaart, On certain characteristics of the distribution of the latent roots of a symmetric random matrix under general conditions, Ann. Math. Statist. 32 (1961), 864–873. MR 130749
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Additional Information
G. Alfelt
Affiliation:
Department of Mathematics, Stockholm University, Roslagsvägen 101, SE-10691 Stockholm, Sweden
Email:
gustava@math.su.se
Keywords:
Random matrices,
matrix-variate gamma distribution,
decision theory
Received by editor(s):
June 21, 2018
Published electronically:
February 27, 2020
Article copyright:
© Copyright 2020
American Mathematical Society