Retirement savings is probably behavioral economists' greatest success story. It is a prototypical behavioral-economics problem because saving for retirement is cognitively hard - figuring out how much to save - and requires self-control.

My mantra is if you want to help people accomplish some goal, make it easy.

I think we also have learned the lesson that we have to have better incentive structures.

Investors must keep in mind that there's a difference between a good company and a good stock. After all, you can buy a good car but pay too much for it.

Why tie to gold? Why not 1982 Bordeaux?

he card companies will often, as a courtesy, honor that credit card, but hit you with a penalty. And you keep swiping your card for $3 at Starbucks for your latté, and you're getting hit with a $25 penalty because it's over your credit limit.

Most people start claiming benefits within a year of when they become eligible, although benefits increase substantially if they wait.