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A 2004 study by psychologist Timothy A. Judge, Ph.D., of the University of Florida, and researcher Daniel M. Cable, Ph.D., of the University of North Carolina, found that for every inch of height, a tall worker can expect to earn an extra $789 per year. That means two equally skilled coworkers would have a pay differential of nearly $5,000 per year, simply because of a 6-inch height differential, according to the study.

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