"One of the features of the sub-prime crisis, that began in August 2007, was its unexpected nature. It came as a surprise not only to most financial market participants but also in some degree to the policy community. In this context, we seek to assess whether early warning systems based on the logit and binomial tree approaches on the UK and US economies could have helped to warn about the crisis. We also consider a `check list approach' of indicators based on history. Although not all of the complementary approaches are successful, we contend that our work suggests that a broadening of approaches to macroprudential analysis is appropriate."

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