Professor Alan Barrett:

My only concern about a multiplicity of analyses is that if people are using a whole range of different models and assumptions it can be chaotic. A budgetary committee would need information that is useful and not just bits of information that are supportive of particular positions. There is an argument to be made for ensuring that any budgetary oversight committee which will be discussing the evidence on a particular policy proposal will at least agree on the single piece of evidence that it wants to deal with, as opposed to having multiple pieces of evidence. That could be tricky however.