Adjusting exchangeable beliefs
可交换信念的调整AI 解读 ↓
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We consider geometrically the practical, theoretical and computational treatment of second-order exchangeability within Bayes linear analysis. We establish Bayes linear sufficiency for sample means through the representation theorem for second-order exchangeable beliefs. Interrelationships between collections of Bayes linear belief adjustments are analysed through the resolution transforms induced by a second-order exchangeable sample. It is shown that the resolution transforms for the underlying population structure and for the prediction of future observables have essentially the same form whatever the sample size. These results are applied to simplify general adjustments of beliefs given second-order exchangeable data. We illustrate the theory by analysing a problem concerning exchangeable regressions.