The Annals of Statistics

The formal definition of reference priors

James O. Berger, José M. Bernardo, and Dongchu Sun
Source: Ann. Statist. Volume 37, Number 2 (2009), 905-938.

Abstract

Reference analysis produces objective Bayesian inference, in the sense that inferential statements depend only on the assumed model and the available data, and the prior distribution used to make an inference is least informative in a certain information-theoretic sense. Reference priors have been rigorously defined in specific contexts and heuristically defined in general, but a rigorous general definition has been lacking. We produce a rigorous general definition here and then show how an explicit expression for the reference prior can be obtained under very weak regularity conditions. The explicit expression can be used to derive new reference priors both analytically and numerically.

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Primary Subjects: 62F15
Secondary Subjects: 62A01, 62B10
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Permanent link to this document: http://projecteuclid.org/euclid.aos/1236693154
Digital Object Identifier: doi:10.1214/07-AOS587
Zentralblatt MATH identifier: 1162.62013
Mathematical Reviews number (MathSciNet): MR2502655

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