For diehard Yankees fans, baseball star Derek Jeter may be worth all the money on Earth. But many less ardent enthusiasts probably wonder whether even someone as good as Jeter should be raking in his kind of dough: $51 million for the current three-year contract, plus millions more in endorsement money. As A. Barton Hinkle notes, we are talking here about a grown man who earns his living by hitting a little white ball thrown at him by another grown man. Meanwhile, the average teacher makes something like three-tenths of 1 percent of Jeter's base salary. Is there any possible way to justify his being paid that much?