Most people think the Iraq war has increased the probability of an attack. However, it's difficult to put this aspect into financial terms.

The reason that the invisible hand often seems invisible is that it is often not there.

There is a clear and strong link between the economy's present woes and the Iraq war. The war was at least one of the factors contributing to rising oil prices - which meant Americans were spending money on imported oil, rather than on things that would stimulate the american economy. Hiring Nepalese contractors in Iraq, moreover, doesn't stimulate the American economy in the way that building a school in America would do - and obviously doesn't have the long term benefits.

One of the real costs of the war is that our security is actually less than it otherwise would have been - ironic, since enhancing security was one of the reasons for going to war. Our armed forces have been depleted - we have been wearing out equipment and using up munitions faster than we have been replacing them; the armed forces face difficult problems in recruitment -by any objective measures,including those used by the armed forces, quality has deteriorated significantly.

The life prospects of an American are more dependent on the income and education of his parents than in any of the other advanced industrial countries.

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.

You can't overestimate what happens when you encourage regulators to believe that the goal of regulation is not to regulate.