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If a colleague takes Milton Friedman out to dinner, sure, he would feel he should pay him back some way, even if his economic theory tells him he shouldn't have to, whether through a dinner of equivalent or slightly better status, or something else that cheap jerseys might be considered equivalent. (Not too little, if he gave him a box of paper clips, that would just be ignored, if he gave him a car, it would be considered weird and make everybody freak out and worry what he was up to.) But the "not too little wholesale jerseys from china not too much" applies to the status of the person who takes you out to dinner too and that was my real point. If the giver is too rich (Bill Gates) or too low status (an eager graduate student) the dinner is unlikely to be reciprocated in the first case, he will say, "great, I really did get something for nothing" as the economic theory says he should, in partly because there's no point in even trying to try to establish