Bloomberg View columnist Barry Ritholtz interviews Scott Galloway, professor of marketing at NYU's Stern School of Business and author of the recent New York Times bestseller "The Four: The Hidden DNA of Amazon, Apple, Facebook, and Google." Galloway is also the founder of several companies, including the business intelligence firm L2, and is the creator of the Digital IQ Index, a global ranking of prestige brands' digital competence. He has also been named one of the World Economic Forum's "Global Leaders of Tomorrow." He received a bachelor's degree from UCLA and an MBA from the University of California at Berkeley.