March 3 - He left behind the high-profile corporate world of General Electric to lead the television ratings. No, he's not the star of a popular show; he's the head of the Nielsen Company, which measures TV viewership. David Calhoun talks about his new position and the challenges of tracking an audience that now has the ability to watch shows live, recorded on televisions, and downloaded to smaller viewing devices. He also talks about the allure of heading a private company and the $100 million it took for him to make the jump from GE.
