Bayes Factor Consistency for Unbalanced ANOVA Models

Details Bayes Factor Consistency for Unbalanced ANOVA Models Bayes Factor Consistency for Unbalanced ANOVA Models

2012-04-06

arxiv.org/abs/1204.1567v1

Statistics

Methodology

17 pages, 0 figure. Final version will be published in Statistics: A Journal of Theoretical and Applied Statistics

Scientific paper

In practical situations, most experimental designs often yield unbalanced data which have different numbers of observations per unit because of cost constraints, or missing data, etc. In this paper, we consider the Bayesian approach to hypothesis testing or model selection under the one-way unbalanced fixed-effects ANOVA model. We adopt Zellner's g-prior with the beta-prime distribution for g, which results in an explicit closed-form expression of the Bayes factor without integral representation. Furthermore, we investigate the model selection consistency of the Bayes factor under three different asymptotic scenarios: either the number of units goes to infinity, the number of observations per unit goes to infinity, or both go to infinity. The results presented extend some existing ones of the Bayes factor for the balanced ANOVA models in the literature.

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