If there are many independent, identically distributed observations governe
d by a smooth, finite-dimensional statistical model, the Bayes estimate and
the maximum likelihood estimate will be close. Furthermore, the posterior
distribution of the parameter Vector around the posterior mean will be clos
e to the distribution of the maximum likelihood estimate around truth. Thus
, Bayesian confidence sets have good frequentist coverage properties, and c
onversely. However, even for the simplest infinite-dimensional models, such
results do not hold. The object here is to give some examples.