Wal-Mart's Supercenters are able to underprice their supermarket competitors about 15%, according to analyst Kalish, in part because they are more efficient but also because .
By refusing to join the International Air Transport Association, which sets identical fares for the world's major airlines, Icelandic remains free to underprice its competitors.
Concert organizers underprice shows to attract interest, but fans end up paying an average of 45% above face value for resold tickets, according to a study by Alan Krueger .