Default priors and model parametrization

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• Nancy Reid, University of Toronto
• Thursday 07 May 2009, 16:00-17:00
• MR5, CMS, Wilberforce Road, Cambridge, CB3 0WB.

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This talk presents the development of classes of priors that ensure calibration of the resulting posterior inferences. These priors are built using asymptotic properties of likelihood inference and location model approximations to general models. The role of parameterization of the model in obtaining calibrated posterior inference for sub-parameters is described, and the proposed priors are related to Jeffreys’ prior and the Welch-Peers approach. Connections are made to so-called strong matching priors, which are data dependent priors derived by equating posterior marginal probabilities to conditional $p$-values, and the importance of targetting the prior on the parameter of interest.

This talk is part of the Statistics series.

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