Migração de valor (parte XIII) ou Ersatz (parte IV)

"Over the past year Asda, which is owned by Wal-Mart, the world's biggest retailer, has seen a marked increase in spend by so-called AB1 shoppers, the kind of affluent consumers who have traditionally bought their food at Marks & Spencer or Waitrose."
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"Asda chief has eye on a good buy for every kind of shopper"