VALUE
Xenophon insists strongly on utility or serviceableness as a necessary quality of property (χρήματα, κτήματα). By this, however, he means primarily, not potential utility in the object, but ability of the owner to use rightly.[[381]] Even exchangeability does not insure value in anything, unless the seller can use to advantage that which he receives in return.[[382]] This idea of value is true enough from the ethical standpoint, and should not be left out of account, as is being recognized by modern economists. But to attempt to build a theory of economic value on such a basis, as Ruskin does,[[383]] would result in hopeless confusion. Value is not merely an individual and moral, but also a social and economic, fact.
A hint of exchange value is given in the implied classification of goods as usable or salable.[[384]] But there is no discrimination between useful things in the economic and uneconomic sense. In the Revenues, on the other hand, when free from Socratic influence, Xenophon makes a positive contribution to the theory of value. He observes that the exchange value of goods varies with supply and demand, and that this law is, in a sense, self-regulative by the fact that workmen tend to enter other fields of activity whenever any industry becomes unprofitable through an oversupply of its products.[[385]]