Chris Holling of Global Insight gestures during his presenta

UNITED STATES - NOVEMBER 04: Chris Holling of Global Insight gestures during his presentation of findings from the report "The Economic Impact of Wal-Mart" during the Economic Impact Research Conference Friday, November 4, 2004, in Washington, D.C. Wal-Mart Stores Inc., the world's largest employer, asked nine economists to assess its effect on the economy. Today, at a conference organized by the company, they'll tell Wal-Mart that it's far from an exemplary employer. (Photo by Ken Cedeno/Bloomberg via Getty Images)