Part of the reason there's a backlash against Big Tech these days is because some of these companies are so big. They're big in terms of users (see: Facebook's 2 billion plus), big in valuation (Amazon and Apple have both topped a trillion dollars) and big in market share (more than 90 percent of all web searches happen on Google). The United States is taking baby steps toward possible regulation. Europe is taking more like Paul Bunyan-sized steps. But critics like Tim Wu argue these companies should have been slowed down long ago. Marketplace Tech’s Molly Wood talks with Wu, author of the new book, "The Curse of Bigness: Antitrust in the New Gilded Age." (11/13/18)