Why do people often make decisions that seem to go directly against their interests? “Neuroeconomics, while still regarded skeptically by mainstream economists, could be the next big thing in the field. It promises to put economics on a firmer footing by describing people as they really are, not as some oversimplified mathematical model would have them be. Eventually it could help economists design incentives that gently guide people toward making decisions that are in their long-term best interests in everything from labor negotiations to diets to 401(k) plans.”