Perhaps concentrated wealth will inspire a nation of innovative problem-solvers. But if the view of many economists is right - that it sometimes discourages innovation - then we should worry.

The Internet is, among other things, a massive, chaotic marketplace. Too much information, it turns out, is a lot like no information.

Hating Wall Street is an American tradition that dates back even to the days when Thomas Jefferson cursed that money lover Alexander Hamilton. And for centuries, the complaints about it have largely stayed the same: 'It does nothing! It creates chaos! It's a parasite that sucks hardworking Americans dry!'

Unlike physics, economists don't settle things. There seems to be plenty of room for different conclusions that are still accepted in the academy.

We've made great progress coordinating better as a government.

I always felt that Jay Z, if he had a different upbringing, could be on Wall Street or in politics. If you really listen to Jay Z talk, he's kind of the smartest guy in the room.

I've had close chances of success, and sometimes politics and people don't work out.

There's a lack of ambition in politics in terms of what we expect from the government, what it means to have a state.