Exceptions.
The rule that goods which have the same cost of production have also equal value in exchange, is applicable only to the extent that it is possible to transfer the factors of production at will from one branch of production to another. Where this really free competition does not exist, the price depends entirely on the quantity of the supply, compared with the solvability or capacity to pay of the purchaser; and hence, it may sometimes rise far above the cost of production (monopoly-price), and sometimes sink far below it (forced price, or under-price).(662) Such hindrances to competition depend, in part, upon natural causes. Thus, in the case of the works of art of a deceased artist, which cannot be increased in number;(663) or in that of living celebrities who cannot extend their mental activity in the same degree that their reputation has grown. So, also, in the case of precious stones, which are sometimes found free, and therefore cost nothing, but which, at the same time, have a high price.(664) Many valuable agricultural products are, together with their production, limited to a definite and sometimes very small district.(665) It is to be regarded as a modification of such natural monopolies when substitutes for a kind of goods which diminish, at least in part, the demand for them, are found, at a cheaper price; for instance, ordinary table-wines in the stead of fine wines. The rule applies much more strictly to those goods which, on account of their greater quantity, can replace inferior ones,(666) than it does to those where this is not possible.
The principal cause of forced or under-prices (Schleuderpreise) is the facility with which the product deteriorates, and must, therefore, find a quick sale, especially when its storage or transportation is attended by further difficulties.(667) But, very durable commodities are also subject to under-prices, and especially those which last longest, because the supply of them can be diminished only very slowly. Thus, for instance, houses, in a declining city. Distress-prices are found most usually in the case of such commodities as are produced without any intention to produce them, as for instance, rags and excrementitious substances. The more the mere forces of nature preponderate in production, the less can the supply be increased or decreased at pleasure, the more frequently, as a consequence, do we find monopoly-prices and under-prices. (Compare § 131 ff.) Thus the production of wheat is invariably connected with the order of the seasons. Between seed-time and harvest, there are a number of months which neither capital nor skill can shorten to any extent. The cultivation of land, to be very much greater and more lasting, supposes so many conditions precedent, increase of live stock, buildings etc., that it can be attained only after a series of years. Hence it happens that wheat, much more than manufactured products, is subject to oppressively high prices and oppressively low ones, during a long period of time. No matter what the influence of the forces operating in the opposite direction may be, the price of wheat depends most largely on the result of the last crop.(668)
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