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Now Playing: 01-11-12 Marketplace

Super PACs are changing the way political campaigns are run. Freakonomics Radio's Stephen Dubner explains how important (or unimportant) money is during primary season. Commentator Robert Reich says you can't take the decrease in unemployment numbers at face value. A new study says that the wealth gap is becoming a major issue in people's minds. Sprint has announced that all its phones will go through an environmental certification process. And Kai Ryssdal talks to the president CBS Interactive about the future of television, and to the CEO of Yum Brands about the global expansion of the company.