Additionally, team members who work certain hours on Thanksgiving and Friday will receive shift differential pay and holiday premium pay.

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But no teacher unionist will support differential pay.

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That is, a smaller pay differential between men and women gives married women sufficient incentive to invest in education and careers.

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That this pay differential between senior and junior employees bears an uncanny resemblance to the gap found in America's legitimate businesses is, of course, entirely coincidental.

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After studying the large pay differential between financial-sector employees and people in other industries with similar levels of education and experience, he and a colleague, Ariell Reshef of the University of Virginia, concluded that some of it could be explained by growing demand for financial services from technology companies and baby boomers.

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"If you want to introduce differential, it's much easier to do it at a time when pay's increasing more quickly so you can, for example, freeze pay in some regions and raise it more quickly in others, " he said.

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Rodriguez, for instance, ranks first in pay and fifth in production (his FTPN was 605), for a value differential of minus 4.

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