Scott Galloway presents the week's biggest winners and losers in digital:
Winner: Amazon. The e-commerce giant has launched an auto review portal, threatening independent review sites. Could dealerships be next?
Loser: Europe, which is becoming irrelevant when it comes to innovation. Only six of the world's most valuable companies are based in Europe, and venture capital funding has declined.
Loser: College students. With textbook prices soaring, two-thirds of students have decided against buying textbooks despite acknowledging that this might hurt their grades.
Loser: Walmart. The retailer's aggressive cost-cutting may have been good for sales, but it also encourages crime.