Long-term for U.S. stock market looks disappointing, says Robert Shiller

CNBC's Bob Pisani talks with Robert Shiller, economics professor at Yale University, about stock market performance and the economic recovery. It's very hard to predict the market, says Shiller. It looks pricey, but I tend to think long-term investing. And in the long term, I think the U.S. stock market is going to be somewhat disappointing, he adds.