An Associated Press analysis suggests that big oil companies have been crimping supplies ... across the country for years. The analysis, based on data from the U.S. Energy Information Administration, indicates that the industry slacked off supplying oil and gasoline during the prolonged price boom between early 1999 and last summer, when prices began to fall. The findings support a conclusion already reached by many motorists. Fifty-five percent of Americans believe gas prices are high because [of] oil companies. Though set back temporarily by the [9/11] attacks, the oil business has profited handsomely since then. The biggest six refiners ... rang up $400 billion in profits since 2001. Though reserves have kept pretty steady, the oil industry taps those resources to varying degrees from year to year. The industry has shelved an average of 21 percent more unrefined oil from the start of 2004 through last June. Last spring, stocks of shelved crude reached their highest level in eight years, despite the fabulous riches at hand in high prices then. The industry also protected profits by not building any new refineries. [And] thanks to mergers, the top 10 companies now control three-quarters of national refining capacity, up from half in the early 1990s. A 2001 study by the Federal Trade Commission reported that some firms were deciding to maximize their profits" by crimping supply. One executive told regulators "he would rather sell less gasoline and earn a higher margin on each gallon sold." However upsetting to drivers, such tactics are usually viewed as legal. "A decision to limit supply does not violate the antitrust laws," regulators wrote in one FTC report.

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