Jonah Berger is a marketing professor at the Wharton School at the University of Pennsylvania and author of New York Times bestsellers Contagious: Why Things Catch On and Invisible Influence: The Hidden Forces that Shape Behavior. In addition to his teaching responsibilities, Berger works with a wide range of businesses—from Fortune 500 companies to small start-ups, and multinationals to non-profits—to help drive new product adoption, sharpen effective messaging, and develop marketing strategy.
We see a lot of....