Some Uncomfortable Findings for Wal-Mart At a gathering sponsored by the retailer, economists will present studies of the giant's economic impact -- not all with flattering results Is Wal-Mart good or bad for the U.S. economy? A group of economists is attempting to answer that question. And the surprise is that the economists' studies, which aren't all complimentary to Wal-Mart (WMT ), are to be presented at a Nov. 4 conference sponsored by the giant retailer itself.