The u. s. postal service (usps) has a constitutionally guaranteed monopoly on first-class mail. in 2015, it charged 49cents for a stamp, which was not the profit-maximizing pricelong dashthe usps's goal, allegedly, is to break even rather than to turn a profit. following the postal services in australia, britain, canada, switzerland, and ireland, the usps allowed stamps to sell a sheet of twenty 49¢ stamps with a photo of your dog, your mommy, or whatever for $22.00 (that's 110¢ per stamp, or a 224% markup). stamps keeps the extra beyond the 49¢ it pays the usps. what is the firm's lerner index? its lerner index is nothing. (en