Jonah Berger is a Marketing Professor at the Wharton School at the University of Pennsylvania, and he is a world-renowned expert on word of mouth, social influence, and consumer behavior. He has published dozens of articles in top‐tier academic journals, and he teaches Wharton’s highest rated online course. Accounts of his work often appear in places like The New York Times, Wall Street Journal, and Harvard Business Review. Dr. Berger is the author of multiple bestsellers including “Contagious: Why Things Catch On” and “Invisible Influence: The Hidden Forces that Shape Behavior.” Berger often keynotes major events. He also consults for companies like Apple, Google, GE, Coca-Cola, Vanguard, 3M, and The Gates Foundation.