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Budget Responsibility and National Audit Bill [Lords]

Amendment 2 calls for the OBR's reports to be published. The Treasury Committee said:"““The OBR should have discretion in the models it uses in drawing up its forecasts. It is a matter for the organisation itself as to whether it is content to use is the Treasury models, or wishes to make changes. Whatever course the OBR takes, there would be benefits in it being as transparent as possible about the models it uses.””" I assume that that would also include the assumptions that underpin those models. The Government's response was positive. They said that they would"““provide the OBR with full access to Treasury and other forecasting models, as well as support to scrutinise and develop these models.””" Again, I assume that that means the assumptions that underpin the Treasury models and whatever other modelling it wishes to undertake. The hon. Member for Nottingham East (Chris Leslie) said that the OBR could take those models and assumptions from the Treasury, and he is absolutely right about that. The OBR currently publishes a number of assumptions. For example, the impact multipliers were included in the June 2010 report, showing the one-for-one impact of capital expenditure cuts. Reports at the time of the Labour Government published assumptions about oil prices, and North sea corporation tax and petroleum revenue tax was used to calculate those yields. Given that several such assumptions are already published, and that the OBR can take all those assumptions, models and changes and create new ones, does it have the discretion to publish what it sees fit? Would it not be better to have a guarantee from the Minister that it will not unnecessarily withhold assumptions where it is important for us all to have transparency? Instead of the Treasury putting the material in the Library, we should ensure that the OBR has the ability to do that, so that we have the information and can come to a proper, reasoned view on whether we believe its figures. That is a simple question, and I am sure that the answer is yes; I certainly hope so. There is no reason why we should not have that transparency so that we can all guarantee the efficacy of the reports that the OBR produces.