The term rent, in its economic sense—that is, when used, as I am using it, to distinguish that part of the produce which accrues to the owners of land or other natural capabilities by virtue of their ownership—differs in meaning from the word rent as commonly used. In some respects this economic meaning is narrower than the common meaning; in other respects it is wider.

It is narrower in this: In common speech, we apply the word rent to payments for the use of buildings, machinery, fixtures, etc., as well as to payments for the use of land or other natural capabilities; and in speaking of the rent of a house or the rent of a farm, we do not separate the price for the use of the improvements from the price for the use of the bare land. But in the economic meaning of rent, payments for the use of any of the products of human exertion are excluded, and of the lumped payments for the use of houses, farms, etc., only that part is rent which constitutes the consideration for the use of the land—that part paid for the use of buildings or other improvements being properly interest, as it is a consideration for the use of capital.