Next June marks the 30th anniversary of the first time a product -- it happened to be a 10-pack package of Wrigley's chewing gum -- was scanned at a supermarket checkout lane. While bar-code scanning has revolutionized the industry since then, retailers are still trying to figure out how best to use all the scan data generated at the point of sale. One strategy that has slowly developed over the past decade or so is for retailers and product manufacturers to jointly use the POS scan data as ...

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