Jonah Berger is a marketing professor at the Wharton School at the University of Pennsylvania and a world-renowned expert on word of mouth; social influence; consumer behavior; and how products, ideas, and behaviors catch on. He has published dozens of articles in top-tier academic journals and teaches Wharton’s highest rated online course, and popular accounts of his work often appear in places like the New York Times, Wall Street Journal, and Harvard Business Review. Professor Berger is the internationally bestselling author of multiple books including Contagious: Why Things Catch On (over half a million copies in print in over 30 languages) and Invisible Influence: The Hidden Forces that Shape Behavior. Professor Berger often keynotes major conferences and events like SXSW and Cannes Lions and consults for companies like Apple, Google, GE, Coca-Cola, Vanguard, 3M, Kaiser Permanente, and the Gates Foundation.