February 1, 2011 3:01 PM

Free trade: As U.S. corn flows south, Mexicans stop farming

Look around the rain-fed corn farms in Oaxaca state, and in vast areas of Mexico, and one sees few young men, just elderly people and single mothers. "The men have gone to the United States," explained Abel Santiago Duran, a 56-year-old municipal agent, as he surveyed this empty village in Oaxaca state.

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