WHEATON, Ill. (Reuters) - German grocery chain Aldi Inc is trying to beat the world's biggest retailer at its own game: low prices. Already with 1,600 U.S. stores, Aldi’s internal studies show ...

Wal-Mart Stores Inc <WMT.N> is running a new price-comparison test in at least 1,200 U.S. stores and squeezing packaged goods suppliers in a bid to close a pricing gap with German-based discount ...