In terms of productivity - that is, how much a worker produces in an hour - there's little difference between the U.S., France, and Germany. But since more people work in America, and since they work so many more hours, Americans create more wealth.

I think people don't understand compound interest because typically no one ever explains it to them and the level of financial literacy in the US is very low.

Of course, looking tough on inflation is part of any central banker's job description: if investors believe that inflation is going to get out of control, you end up with higher interest rates and capital flight, and a vicious circle quickly ensues.

Workers who come to the U.S. see their wages and their standard of living boosted sharply simply by crossing the border. That's a good thing, and one of the best arguments for immigration reform, even if you'll rarely hear a politician make it.

In terms of productivity - that is, how much a worker produces in an hour - there's little difference between the U.S., France, and Germany. But since more people work in America, and since they work so many more hours, Americans create more wealth.

Procrastination also can be a way of self-handicapping: if you don't do a great job, you can always say to yourself, "If I'd only started sooner, I'd have been able to produce something excellent."

Bubbles and crashes are textbook examples of collective decision making gone wrong. In a bubble, all of the conditions that make groups intelligent - independence, diversity, private judgement-disappear.