"Soaring international demand for corn has caused a spike in prices for Mexico's humble tortilla, hitting the poor and forcing President Felipe Calderon's business-friendly government into an uncomfortable confrontation with powerful monopolies.
Tortilla prices have jumped nearly 14 percent over the past year, a move the head of Mexico's central bank called "unjustifiable" in a country where inflation ran about 4 percent.
Economists blame increased U.S. production of ethanol from corn as an alternative to oil. The battle over the tortilla, the most basic staple of the Mexican diet, especially among the poor, demonstrates how increasing economic integration is felt on the street level."