“…As Blyth has pointed out, before agents can respond to a crisis they have to have some idea what caused it and ideas in this context can act to reduce the 'Knightian' uncertainty that accompanies unique events, by providing a diagnosis of those events. In many respects, this period represented a period of exceptional crisis politics, during which routine calculations of interest became upset by dramatic events, with macroprudential ideas providing an explanation of a confusing situation that also reconfigured perceptions of interest and allowed agents to redefine their understanding of their relationship to the crisis (Polsky, 2000, Blyth, 2002. During this period MPR became established as a normative and political priority, not only amongst the leaders and ministers of the G20, but also became diffused and established in the work programmes of the more technical committees of the BCBS, the FSB, the BIS, national central banks and even public-private policy communities consisting of major industry representatives such as the G30.…”