Mexico -- Mexico's state-owned oil monopoly is facing an unusual situation in its border cities: it's having to compete for customers.
With regular gasoline selling for about $2.11 a gallon on the Mexican side, the tens of thousands of northern Mexicans who routinely cross the border virtually all buy their gas in the United States. Along the southern border, Mexicans have flocked to Belize to buy its lower-priced gas.
As local sales plummeted, Petroleos Mexicanos--known as Pemex--reluctantly bowed to the law of supply and demand, slashing prices in May to