File photo of a customer paying for merchandise at a Wal-Mart store in Mexico City

 
File photo of a customer paying for merchandise at a Wal-Mart store in Mexico City
A customer pays for merchandise at a Wal-Mart store in Mexico City in this November 17, 2011 file photo. U.S. retail giant Wal-Mart Stores Inc squelched its own internal investigation of allegations made by a former executive of its subsidiary in Mexico that the Mexican division had orchestrated a campaign of bribery to grab market dominance, the New York Times reported on April 21, 2012. REUTERS/Henry Romero/Files (MEXICO - Tags: BUSINESS)