There is an increasing demand for putting a shadow price on the environment to guide public policy and incentivize private behaviour. In practice, setting that price can be extremely difficult as uncertainties abound. There is often uncertainty not just about individual parameters but about the...

The experience of monetary policy making in an uncertain environment has encouraged increased attention to the concept of model uncertainty, that is, uncertainty as to which is the best model. A particular difficulty has been the need to operationalise the concept in order to yield definitive...