dunnhumby has unveiled the results of its eighth annual Retailer Preference Index (RPI), a study that delves into the U.S. grocery market, valued at nearly $1 trillion. This year’s study included 11,000 American consumers and revealed that the key to long-term retail success in the retail sector is providing savings to customers through pricing strategies, promotions, and rewards. This element has grown in importance over the past eight years, now accounting for 38% of a retailer’s overall success, the highest recorded....