Putting a dollar value on a good name: “That study found that the feedback system that creates eBay reputations was widely employed, for more than half of the transactions, in fact. That study also showed that, perhaps surprisingly, more than 99 percent of feedback on sellers was positive. Zeckhauser said the eBay reputation system is a good example of a system that works. There are others in wide use in our society that do not, however. The system of job references, he said, almost always provides positive feedback, even when the person was fired from a previous position.”