Noted: Long-standing mattress retailer Sleepy’s was founded in 1931, with Mattress Firm coming around in 1986 and Tempur-Pedic in 1992. For many of the more traditional mattress retailers, sales strategies consisted of inflated prices and little innovation, according to Hart Posen, associate professor of management and human resources at the University of Wisconsin. “At store number one, they sold you ‘posturepedic best sleep’ and then the next store, so they wouldn’t have to compete, they had ‘posturepedic good sleep’ — the same mattresses with slightly different colored threads or what have you and a different name to make price comparison more difficult,” Posen told Retail Dive.