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high prices serve two essential functions: they encourage production and conservation. Spurred by the lure of windfall profits, oil companies will move heaven and earth to get more gasoline to consumers. Shocked by the tab when they fill up a 5,600-pound SUV, motorists look for opportunities to leave the Suburban at home. They may even commit a sin not covered by the Ten Commandments: coveting their neighbor's Prius.
Controlling prices, by contrast, would have exactly the opposite effect: Telling consumers they should waste fuel to their hearts' content, and telling producers to leave the black stuff in the ground.