C. _Relations_ to persons or things which may frequently be estimated just as accurately as material goods. (The _res incorporales_ of the Roman law.) I need only mention what is called good-will, which freely, and to the advantage of customers themselves, but still with a limited amount of certainty, attaches to certain localities, and for which tavern-keepers, sometimes, as in theaters, dépôts and clubs, pay so enormous a rent.(69) When a newspaper is sold, the purchaser frequently buys nothing but the existing relations between his colaborers, subscribers etc. No small part of the value of a good business firm consists in the confidence with which it inspires all who deal with it, thus sparing them a world of care and trouble.(70) A general may be of incalculable value to an army which he has himself helped organize. In another, or in the service of a country not his own, he might be entirely valueless, incapable of accomplishing anything.(71) With the progress of civilization, as man becomes more social, the number of valuable relations increases, while that of legalized monopolies is wont to decrease. (_Schäffle._)(72) Section IV. Of Value.—Value In Use. The economic value of goods is the importance they possess for the purposes of man, considered as engaged in economy (housekeeping, husbandry.(73)) Looked at from the point of view of the person who wishes to employ them in his use directly, doubtless the oldest point of view, value appears first as value in use; and here, according to the difference of subjective purposes it is intended to subserve, we may speak of production value or enjoyment-value; and of this last, in turn, as utilization-value, or consumption-value. The value in use of goods, is greater in proportion as the number of wants they are calculated to satisfy are more general and more urgent, and in proportion as they are gratified by them more fully, surely, durably, easily and pleasantly.(74) Hence, it is seldom possible to find an accurate mathematical expression of the relation which exists between the value in use of different goods.(75) Thus, it is possible to estimate the nutritive power of different kinds of goods, the value of wheat or of hay for instance, but not the goodness or quality of their taste, of the attractiveness of their appearance, etc.