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By Matt Day

Source: Bloomberg

People shopping online for groceries at Amazon.com Inc. or Walmart Inc. are more likely to encounter big differences in prices based on their location — even down to the ZIP code — than shoppers who venture into physical stores, researchers found.

Software that adjusts an item’s price based on factors like availability, pricing at competitors and even individual shopping behavior, is almost as old as e-commerce. But as the pandemic supercharges online grocery shopping, a study from researchers at the Massachusetts Institute of Technology has a warning: Buyer beware.

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