Recognised as one of “the best 40 B-school profs under 40,″ Kartik Hosanagar is a professor of technology and digital business at The Wharton School of the University of Pennsylvania. Previously, he was a co-founder of Yodle Inc. Hosanagar has served on the advisory boards of startups Milo (now part of eBay), Monetate, and Sociosquare. Follow him on Twitter @khosanagar.