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The Asymptotic Minimax Risk for the Estimation of Constrained Binomial and Multinomial Probabilities

Dietrich Braess and Holger Dette
Sankhyā: The Indian Journal of Statistics (2003-2007)
Vol. 66, No. 4 (Nov., 2004), pp. 707-732
Published by: Springer on behalf of the Indian Statistical Institute
Stable URL: http://www.jstor.org/stable/25053397
Page Count: 26
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The Asymptotic Minimax Risk for the Estimation of Constrained Binomial and Multinomial Probabilities
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Abstract

In this paper we present a direct and simple approach to obtain bounds on the asymptotic minimax risk for the estimation of constrained binomial and multinomial proportions. Quadratic, normalized quadratic and entropy loss are considered and it is demonstrated that in all cases linear estimators are asymptotically minimax optimal. For the quadratic loss function the asymptotic minimax risk does not change unless a neighborhood of the point 1/2 is excluded by the restrictions on the parameter space. For the two other loss functions the asymptotic behavior of the minimax risk is not changed by such additional knowledge about the location of the unknown probability. The results are also extended to the problem of minimax estimation of a vector of constrained multinomial probabilities.

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