its high comparative real price, or the greater quantity of capital and labour which must be employed to produce it.10
This, I apprehend, is the correct account of all permanent variations in price, whether of corn or of any other commodity. A commodity can only permanently rise in price, either because a greater quantity of capital and labour must be employed to produce it, or because money has fallen in value; and on the contrary, it can only fall in price, either because a less quantity of capital and labour may be employed to produce it, or because money has risen in value.
A variation arising from the latter of either of these alternatives, an altered value of money, is common at once to all commodities; but a variation arising from the former cause, is confined to the particular commodity requiring more or less labour in its production. By allowing the free importation of corn, or by improvements in agriculture, raw produce would fall; but the price of no other commodity would be affected, except in proportion to the fall in the real value, or cost of production, of the raw produce which entered into its composition.