Marketing professor Jonah Berger is a professor at the University of Pennsylvania, and has spent more than a decade researching, studying and teaching about social influence, products and ideas.
He has published countless articles for journals and outlets such as the Harvard Business Review and the New York Times, and has consulted for multiple Fortune 500 companies. He is the author of two best-selling books; Contagious: Why Things Catch On and Invisible Influence: The Hidden Forces that Shape Behavior.