USC football coach's influence stretches off the field, from the inner city to the bottom line.

No one needs to conduct a poll to realize that the eighth-year coach of the Trojans has high approval ratings. But are people fully aware of what they are approving when they cheer for the coach from the stands at the Los Angeles Coliseum or praise his accomplishments in the media?

A President is measured by what he accomplishes, and the same can be said for a college football coach.

What, then, is the "Pete Carroll Effect"?

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