ShareJonah Berger on Why ‘Word of Mouth Is So Much More Important Than You Might Think’
Jonah Berger has spent more than 15 years studying social influence. A marketing professor at the Wharton School at the University of Pennsylvania, he is the New York Times and Wall Street Journal bestselling author of Contagious: Why Things Catch On and Invisible Influence: The Hidden Forces That Shape Behavior.