Steven Levitt

The major challenge facing most foundations is that they are risk averse. This inhibits their ability to experiment and commit to the experimentation and innovation process.

Wall Street is populated by a bunch of people whose primary goal is to make money, and the rules are pretty much caveat emptor.

People don't like it, but inevitably we need to think about both the costs and the benefits of health care. We cannot avoid the financial consequences.

The most obvious things are often right there, but you don't think about them because you've narrowed your vision.

Go out and collect data and, instead of having the answer, just look at the data and see if the data tells you anything. When we're allowed to do this with companies, it's almost magical.

I do think that the standard media is controlled by the conventional wisdom about global warming. We've come to believe - from reading a lot of articles and talking to a lot of scientists - that there's another side to be heard.

If you really accept that global warming puts the world at risk, then you think you would be open to any solution that could undo it.

As I see it, most major philanthropists have been bullied into giving. They feel social pressure to give. It has become a cost of doing business.

Experts are human, and humans respond to incentives. How any given expert treats you, therefore, will depend on how that expert's incentives are set up.

You'd be a fool or a deluded idealist to think ethics would be prominent on Wall Street. That is not a statement against people in the money business, just a fact.

Good social media is authentic. What makes social media work is actually having something to say.