For years, we've grown dependant on American consumers as the world's spenders of last resort. They've kept Europe out of recession, allowed China to industrialise, and prevented global deflation. But at the same time, they've not been looking after their own futures.

But sometimes it's good to dare yourself to do the unthinkable. And rather than stand in front of an audience with no clothes on, I decided to have a go at stand-up comedy.

Britain, however, has ended up specializing in the ones you don't see as much of: defense aerospace, making drive shafts for cars, pills and drugs, designing chips that go into 94 percent of the world's mobile phones.

Personally, I don't see old economics and behavioural economics as opposed. It is useful to assume people are rational as a good approximation to their long term behaviour, but it would be unwise not to think how in practice their behaviour may deviate from that simplifying assumption.

For years, we've grown dependant on American consumers as the world's spenders of last resort. They've kept Europe out of recession, allowed China to industrialise, and prevented global deflation. But at the same time, they've not been looking after their own futures.

It is no wonder that bank capital is regulated. When borrowing and lending is profitable, it is tempting for banks to scale up their operations and to borrow and lend too much in relation to their capital, in effect reducing the effectiveness of the potential capital cushion.

Interestingly, human irrationality is a hot topic in economics at the moment. Behavioural economics it's called, on the cusp of economics and psychology.