Pemex is the only gas station where you can buy gasoline in Mexico.

Pemex is the Mexican government-owned petroleum company that is a monopoly. They drill for oil, refine it, and then sell it in their own gas stations. When I drove to Mexico in July, Pemex sold gasoline for the same price as it did in December of 2007, the last time I drove down there. Meanwhile, gas in the U.S. practically doubled. This about the only case that I can think of in which a government monopoly actually benefited citizens. As soon as I crossed the border, I saved money on gas. If gas in Mexico practically double as in the U.S., the Mexican economy would suffer greatly. It has already undergone a significant downturn due to unemployment, the housing crisis, and rising prices in the U.S., thereby causing Mexicans working in the U.S. to send less money home to Mexico. So, I, personally benefited from the fixed prices of gasoline in Mexico by paying less at the pump.

Don't forget to send money home!