World War II was really unusual, because America was in the Great Depression before. So the war did help the US economy to get securely out of this decline. This time, the war [in Iraq] is bad for the economy in both the short and long run. We could have spent trillions in research or education instead. This would have led to future productivity increases.

We could have saved Wall Street without putting our future in jeopardy. I predicted that there would be all-around consequences - in the long run as well as in the short run. People are now saying we can't afford health care reform because we spent all the money on the banks. So, in effect, we're saying that it's better that we give rich bankers a couple of trillion than giving ordinary Americans access to health care.

Economists often like startling theorems, results which seem to run counter to conventional wisdom.

What you measure affects what you do. If you don't measure the right thing, you don't do the right thing.

I've always been sceptical about the notion that the market is a person you can engage in an argument with, and that that person is an intelligent, rational, well-intentioned person: it is fantasy. We know that ... the market is subject to irrational optimism and pessimism, and is vindictive ... You're dealing with a crazy man ... Having got what he wants he will still kill you.

For that to happen, growth has to be very strong. To get back to normalcy, we will have to have extended growth of more than 3 percent. That's not in the cards.

The country that's been most successful at that is Norway. The more typical countries are those in the Middle East where a small group seizes those resources, uses it to buy arms to make sure that they can oppress the remainder, and you get these great inequalities. So Canada is among the better performing of the natural resource economies, but it's still not up to the best performing.