If Holiday Retail Stats Don’t Have Economists Saying “Humbug,” Tuesday’s GDP Report Certainly Will

If it’s good enough for Wal-Mart… Looks like the discounting model pioneered by Wal-Mart Stores Inc. ( WMT ), the Bentonville, Ark.-based retailing giant, will make its way to some rather unlikely high-end retailers: Barney’s New York Inc . and Neiman Marcus Inc . have…