Abstract
Suppose that just the lower and the upper bounds on the probability of a measurable subset K in the parameter space ω are a priori known. Instead of eliciting a unique prior probability measure, consider the class Γ of all the probability measures compatible with such bounds. Under mild regularity conditions about the likelihood function, both prior and posterior bounds on the expected value of any function of the unknown parameter ω are computed, as the prior measure varies in Γ. Such bounds are analysed according to the robust Bayesian viewpoint. Furthermore, lower and upper bounds on the Bayes factor are corisidered. Finally, the local sensitivity analysis is performed, considering the class Γ as a aeighbourhood of an elicited prior
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