Just to get an idea:
...Stiglitz is perhaps best known for his unrelenting assault on an idea that has dominated the global landscape since Ronald Reagan: that markets work well on their own and governments should stay out of the way. Since the days of Adam Smith, classical economic theory has held that free markets are always efficient, with rare exceptions. Stiglitz is the leader of a school of economics that, for the past 30 years, has developed complex mathematical models to disprove that idea. The subprime-mortgage disaster was almost tailor-made evidence that financial markets often fail without rigorous government supervision, Stiglitz and his allies say. The work that won Stiglitz the Nobel in 2001 showed how "imperfect" information that is unequally shared by participants in a transaction can make markets go haywire, giving unfair advantage to one party. The subprime scandal was all about people who knew a lot—like mortgage lenders and Wall Street derivatives traders—exploiting people who had less information, like global investors who bought up subprime- mortgage-backed securities. As Stiglitz puts it: "Globalization opened up opportunities to find new people to exploit their ignorance. And we found them."
Stiglitz's empathy for the little guy—and economically backward nations—comes to him naturally. The son of a schoolteacher and an insurance salesman, he grew up in one of America's grittiest industrial cities—Gary, Ind.—and was shaped by the social inequalities and labor strife he observed there. Stiglitz remembers realizing as a small boy that something was wrong with our system. The Stiglitzes, like many middle-class families, had an African-American maid. She was from the South and had little education. "I remember thinking, why do we still have people in America who have a sixth-grade education?" he says.
Those early experiences in Gary gave Stiglitz a social conscience—as a college student, he attended Martin Luther King's "I Have a Dream" speech—and led him to probe the reasons why markets failed. While studying at MIT, he says he realized that if Smith's "invisible hand" always guided behavior correctly, the kind of unemployment and poverty he had witnessed in Gary shouldn't exist. "I was struck by the incongruity between the models that I was taught and the world that I had seen growing up," Stiglitz said in his Nobel Prize lecture in 2001. In the same speech he declared that the invisible hand "might not exist at all." The solution, Stiglitz says, is to move beyond ideology and to develop a balance between market-driven economies—which he favors—and government oversight....