Six principles make ideas, products, and campaigns go viral, and groups can benefit, author says Berger Some things catch on, some don't. And Jonah Berger says he knows why. Berger, an assistant professor of marketing at The Wharton School at the University of Pennsylvania, spent more than a decade studying what drives "social epidemics," and other related questions. Berger's objects of study ranged from fundraising campaigns to safe-sex messages to New York Times articles, from baby names to political messages, to YouTube videos. A few years ago, he started teaching his findings in a Wharton course called "Contagious." Now, Berger has released a new book of the same… Read More