A very simple bad decision is to get into debt. And that is very expensive.

Disasters are usually a good time to re-examine what we've done so far, what mistakes we've made, and what improvements should come next.

When it comes to the mental world, when we design things like health care and retirement and stock markets, we somehow forget the idea that we are limited. I think that if we understood our cognitive limitations in the same way that we understand our physical limitations … we could design a better world.

The most difficult thing is to recognize that sometimes we too are blinded by our own incentives. Because we don’t see how our conflicts of interest work on us.

We should teach the students, as well as executives, how to conduct experiments, how to examine data, and how to use these tools to make better decisions.

The real issue is, how much goodwill do you invest in the work? And goodwill is not something that we can buy with money. It's very hard to buy goodwill with money.

The things that motivate us are to help other people, to feel that we're useful, to feel that we're getting better, to feel that we are kind of living to our potential, to get a sense of meaning. All of those things are positive.