haircuts or child care are examples. Con-
sequently, the distinction between earnings-intensive and other commodities
corresponds only partly to the usual distinction between leisure and other
commodities. Since it has been shown that the relative importance of forgone earnings rather than any concept of leisure is more relevant for economic
analysis, less attention should be paid to the latter. Indeed, although the
social philosopher might have to define precisely the concept of leisure,' the
economist can reach all his traditional results as well as many more without
introducing it at all!