High crude oil prices would result in high fees charged by MasterCard, cutting into the margins of the gas station owner.

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But according to residents, Shuyang halted sales in 2000 as parents began to complain about the high fees charged by the private schools.

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For the first seven years Telmex held a monopoly on phone service, and it succeeded in imposing some of the highest prices anywhere in the world. (All bidders were offered a similar competition-free period.) The market opened to rivals in 1997, and Telmex tangled with competitors repeatedly over the high access fees it charged them.

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