When parents have college savings accounts for their kids, their kids show higher social and cognitive performance.

The experiments show quite clearly that, as you resist more and more temptation, you're actually more and more likely to fail.

I think we could get people to both be more productive and happier. We're less productive as individuals. We're less productive as companies, and we're more miserable.

But because human being tend to focus on short-term benefits and our own immediate needs, such tragedies of the commons occur frequently .

The more cashless our society becomes, the more our moral compass slips.

We're actually trying to develop an iPhone app, now that the Droid is out, we'll do it for that as well, if we ever learn how to program on this thing. But the idea is that to make money concrete. So, you can do this app, and it's not out there, but you can do the app. And you say, "I like vacation in the Bahamas, shoes, lattes, and books." And now, when you are tempted to buy something, that thing translates in terms of the things you are interested in.

Money is very difficult to think about. So, we think about money as the opportunity cost of money. So, we at some point went to a Toyota dealership and we asked people, what will you not be able to do in the future if you bought this Toyota? Now, you would expect people to have an answer. But people were kind of shocked by the question. They never thought about it before. So, the most we got was people said, "Well, if I can't buy this Toyota, if I buy this Toyota, I can't buy a Honda." What is this thing? What is this value of price? Very hard to think about it.