In 2010, Panera Bread launched a nonprofit called Panera Cares, a set of stores around the U.S. operated on a “pay-what-you-can basis.” The underlying assumption was that customers of means would pay more to support customers with less -- or even no -- money. The company opened five Panera Cares stores in St. Louis; Portland; Chicago; Dearborn, Michigan; and Boston. All had closed by February of this year. Several articles and at least one business case have been published on the Panera Cares initiative, and different authors draw different conclusions. In Fast Company, for example, author Adele Peters characterizes the...