Firing employees, that's unfortunately part of doing business.

Every math curriculum in the world is based on the idea of hand-calculating, and most of what you're teaching is how to calculate. And I think the resistance to this is very variable.

The Bernie Sanders phenomenon shows that it's not confined to Republicans. There is a general sentiment that America is on the wrong track.

It's hard to conceive that it would take more forces to provide stability in post-Saddam Iraq than it would take to conduct the war itself and secure the surrender of Saddam's security forces and his army. Hard to imagine.

I'm constantly asking for alternative views on most things that come to me.

I think it's a mistake to rely too much on any one economic factor. It's why investors try to spread their portfolio round.

People change their habits. I know Americans who don't go to Paris because they think it is too dangerous.