Economists who adhere to rational-expectations models of the world will never admit it, but a lot of what happens in markets is driven by pure stupidity - or, rather, inattention, misinformation about fundamentals, and an exaggerated focus on currently circulating stories.

Some of the best theorizing comes after collecting data because then you become aware of another reality.

As I write in 2012 we certainly do not believe that it is over yet, and the worst may be yet to come. Efforts by governments to solve the underlying problems responsible for the crisis have still not gotten very far, and the 'stress tests' that governments have used to encourage optimism about our financial institutions were of questionable thoroughness.

Liberalism downplays certain of our moral senses: loyalty, authority, and sanctity.

The good news is that, at least in economics, I've seen movement away from its overemphasis on mathematical models of purely rational behavior to a more eclectic and commonsense approach: research that is, among other things, more respectful of insights from psychology.

I have argued that we need livelihood insurance, which would protect people against the risk of seeing their skills and expertise no longer needed. Such insurance could be offered by the private sector.

Each profession has its own toolkit.