You saw on your TV what happened in New Orleans after Hurricane Katrina. The Reserves or National Guard are usually the people we use for those national emergencies. They weren't here, they were over in Iraq, and so we were less protected.

But individuals and firms spend an enormous amount of resources acquiring information, which affects their beliefs; and actions of others too affect their beliefs.

Similarly, payments for a dead soldier amount to only $500,000, which is far less than standard estimates of the lifetime economic cost of a death. This statistical value of a life in the US amounts to circa $6.5 million.

Moreover, because we chose to finance the way by borrowing, our deficits and debt has soared, and this means we have less room for maneuver, less money available to stimulate the eocnomy in the way needed.

We noted the psychological problems facing many of the returning from Iraq veterans - of the 700,000 returning veterans, more than a 100,000 have been diagnosed with problems, but the numbers are likely to get worse, as those with multiple deployments return. We should have valued the loss of life as a result of these suicides, using the same procedures we used for the loss of those who died in combat.

I understand why political leaders in the beginning want to be cheerleaders to generate optimism. But to admit that they didn't understand the depths of the problem afterwards, I found a little bit surprising.

I think what they've been doing is largely almost in firefighting mode without a good conceptual framework - either at the micro or the macro level. Micro, you would ask: "What kind of financial or banking system do we want?" Macro, you would say: "What are the underlying problems in the structure of our economy?"