With tipping a central part of the American restaurant industry, better service often is attributed to whether or not a server believes a customer will be a good tipper. Now, researchers at the University of Missouri have found that restaurant servers often use stereotypes to determine which customers will leave better tips. Dae-Young Kim, an associate professor of hospitality management in the MU College of Agriculture, Food and Natural Resources, says that servers believe well-dressed customers are the most likely to leave good tips. The researchers say this could result in those well-dressed diners receiving better service.