"In a world market that was free of all taxes, royalties, or other governmental constraints, and in which competition was effective, the price of oil would be very low. But the real-world market for oil is dominated by high taxation by the oil-exporting nations, and, since 1972, by concerted efforts of the members of the OPEC to raise prices and to restrict output. Because of effective competition in the industry and the power of OPEC, an international oil company today has relatively little influence on the price of oil to consumers."