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Ignorance prior distribution of a hyperparameter and Stein's estimator

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Summary

The concept of ignorance prior distribution is extended to the case of a hyperparameter. This leads to a procedure of formulating the partial ignorance of the original parameter. Its application to the estimation of the mean of a multivariate normal distribution with a particular hyperparameterized prior distribution of the mean leads to an improper prior distribution with the corresponding posterior mean very close to the James-Stein estimate.

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The Institute of Statistical Mathematics

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Akaike, H. Ignorance prior distribution of a hyperparameter and Stein's estimator. Ann Inst Stat Math 32, 171–178 (1980). https://doi.org/10.1007/BF02480322

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  • DOI: https://doi.org/10.1007/BF02480322

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