Quoted: “Once you get to that kind of industry concentration, it’s not about differentiation, it’s about pricing power,” said Hart E. Posen, an associate professor of management at the University of Wisconsin-Madison’s School of Business. “With two or three big competitors dominating the industry, it’s not about rivalry because one firm knows that if they lower prices, the other firm will have to lower prices. If one firm invests in substantial differentiation, then the other firm will — and no one will necessarily be better off.”