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Small businesses are changing hands at the fastest pace since the recession
By Douglas MacMillan
As consumer spending sags, pinched retailers are being forced to trim staff, squelch marketing, close stores, and lure shoppers with big markdowns.
But many retail outlets are ramping up spending in one area: technologies that track customer behavior and purchasing patterns. In this BusinessWeek slide show, we explore seven data-gathering gadgets that could be watching you on your next trip to the grocery.