Microsoft researchers bring computer power to social science - Next at Microsoft

It's called the prisoner's dilemma and it goes like this: You and a fellow gang member are in jail. One of you committed a heinous crime, but the prosecutor doesn't know who. Instead, you are both booked on a lesser charge and serving a one-year sentence in solitary confinement. But here's the deal: The prosecutor has given you both an opportunity to rat. If you betray your fellow gang member but are not ratted on, you walk free while your buddy serves a three-year term.