A huge report from Consumer Reports, Groundwork Collaborative and More Perfect Union has revealed that pricing experiments by Instacart could be inflating or reducing grocery prices for different users on the same items at the same stores. These prices could differ up to 23% at some of the largest grocers in the country, including Costco, Kroger, Safeway and Target.

The collaborative report involved enrolling 437 shoppers across four cities where individual shoppers would add the same items to their carts in the Instacart app from the same store. According to their findings, nearly 75 percent of the grocery items were shown at multiple prices, with as many as five different prices for one product.

On average, the difference between the highest and lowest price was 13%, while the largest

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