In a world where most retailers are categorized as having a monopolistic competition market structure, Wal-Mart Stores Inc. appears to have an oligopoly market structure. Nevertheless, because there are far too many retailers to deal with, then they also have a monopolistic competition market structure. Regardless, Wal-Mart would rather have it this way because it has not hurt them at all by having competition. When Wal-Mart Stores Inc. opened its doors to their first discount store in 1962, Sam Walton had no idea his business would take off like it has to this day. The reason for Wal-Mart's succe