Orley Ashenfelter really loves wine: "When a good red wine ages," he says, "something quite magical happens." Yet Orley isn't just obsessed with how wine tastes. He wants to know about the forces behind great and not-so-great wines. "When you buy a good red wine," he says, "you're always making an investment, in the sense that it's probably going to be better later. And what you'd like to know is not what it's worth now, but what it's going to be worth in the future.