Asymptotically minimax Bayesian predictive densities for multinomial models

Details Asymptotically minimax Bayesian predictive densities for multinomial models Asymptotically minimax Bayesian predictive densities for multinomial models

2011-12-05

arxiv.org/abs/1112.0818v1

Mathematics

Statistics Theory

Scientific paper

One-step ahead prediction for the multinomial model is considered. The performance of a predictive density is evaluated by the average Kullback-Leibler divergence from the true density to the predictive density. Asymptotic approximations of risk functions of Bayesian predictive densities based on Dirichlet priors are obtained. It is shown that a Bayesian predictive density based on a specific Dirichlet prior is asymptotically minimax. The asymptotically minimax prior is different from known objective priors such as the Jeffreys prior or the uniform prior.

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