Electronic shelf labels refuse to die. But will they ever find a home in the U.S. supermarket industry? ESLs — wireless plastic modules that display digital prices on LCD or LED screens and are controlled from a back room — have been marketed to U.S. food retailers by a slew of small and large technology vendors over the past two decades, to little or no avail. Despite their ability to execute thousands of price changes electronically, thereby eliminating the labor- and time-consuming ...

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