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case of the musical box in the wilds of America) by the buyer's extreme estimate of its worth to himself. This is in one sense true, but forms no exception, nevertheless, to the dependence of the value on supply and demand. The monopolist can fix the value as high as he pleases, short of what the consumer either could not or would not pay; but he can only do so by limiting the supply. The Dutch East India Company obtained a monopoly price for the produce of the Spice Islands, but to do so they were obliged, in good seasons, to destroy a portion of the crop. Had they persisted in selling all that they produced, they must have forced a market by reducing the price, so low, perhaps, that they would have received for the larger quantity a less total return than for the smaller: at least they showed that such was their opinion by destroying the surplus. Even on Lake Superior, Mr. De Quincey's huckster could not have sold his box for sixty guineas, if he had possessed two musical boxes and desired to sell them both. Supposing the cost price of each to be six guineas, he would have taken seventy for the two in preference to sixty for one; that is, although his monopoly was the closest possible, he would have sold the boxes at thirty-five guineas each, notwithstanding that sixty was not beyond the buyer's estimate of the article for his purposes. Monopoly value, therefore, does not depend on any peculiar principle, but is a mere variety of the ordinary case of demand and supply.
Again, though there are few commodities which are at all times and for ever unsusceptible of increase of supply, any commodity whatever may be temporarily so; and with some commodities this is habitually the case. Agricultural produce, for example, cannot be increased in quantity before the next harvest; the quantity of corn already existing in the world is all that can be had for sometimes a year to come. During that interval corn is practically assimilated to things of which the quantity cannot be increased. In the case of most commodities, it requires a certain time to increase their quantity; and if the demand increases, then, until a corresponding supply can be brought forward, that is, until the supply can accommodate itself to the demand, the value will so rise as to accommodate the demand to the supply.
There is another case, the exact converse of this. There are some articles of which the supply may be indefinitely increased, but cannot be rapidly diminished. There are things so durable that the quantity in existence is at all times very great in comparison with the annual produce. Gold, and the more durable
metals, are things of this sort; and also houses. The supply of such things might be at once diminished by destroying them; but to do this could only be the interest of the possessor if he had a monopoly of the article, and could repay himself for the destruction of a part by the increased value of the remainder. The value, therefore, of such things may continue for a long time so low, either from excess of supply or falling off in the demand, as to put a complete stop to further production; the diminution of supply by wearing out being so slow a process, that a long time is requisite, even under a total suspension of production, to restore the original value. During that interval the value will be regulated solely by supply and demand, and will rise very gradually as the existing stock wears out, until there is again a remunerating value, and production resumes its course. Finally, there are commodities of which, though capable of being increased or diminished to a great, and even an unlimited extent, the value never depends upon anything but demand and supply. This is the case, in particular, with the commodity Labour; of the value of which we have treated copiously in the preceding Book: and there are many cases besides, in which we shall find it necessary to call in this principle to solve difficult questions of exchange value. This will be particularly exemplified when we treat of International Values; that is, of the terms of interchange between things produced in different countries, or, to speak more generally, in distant places. But into these questions we cannot enter, until we shall have examined the case of commodities which can be increased in quantity indefinitely and at pleasure; and shall have determined by what law, other than that of Demand and Supply, the permanent or average values of such commodities are regulated. This we shall do in the next chapter,
OF COST OF PRODUCTION, IN ITS RELATION TO VALUE
§ 1. When the production of a commodity is the effect of labour and expenditure, whether the commodity is susceptible of unlimited multiplication or not, there is a minimum value which is the essential condition of its being permanently produced. The value at any particular time is the result of supply and demand; and is always that which is necessary to create a market for the existing supply. But unless that value is sufficient to repay the Cost of Production, and to afford, besides, the ordinary expectation of profit, the commodity will not continue to be produced. Capitalists will not go on permanently producing at a loss. They will not even go on producing at a profit less than they can live on. Persons whose capital is already embarked, and cannot be easily extricated, will persevere for a considerable time without profit, and have been known to persevere even at a loss, in hope of better times. But they will not do so indefinitely, or when there is nothing to indicate that times are likely to improve. No new capital will be invested in an employment, unless there be an expectation not only of some profit, but of a profit as great (regard being had to the degree of eligibility of the employment in other respects) as can be hoped for in any other occupation at that time and place. When such profit is evidently not to be had, if people do not actually withdraw their capital, they at least abstain from replacing it when consumed. The cost of production, together with the ordinary profit, may therefore be called the necessary price, or value, of all things made by labour and capital. Nobody willingly produces in the prospect of loss. Whoever does so, does it under a miscalculation, which he corrects as fast as he is able.
When a commodity is not only made by labour and capital, but can be made by them in indefinite quantity, this Necessary Value, the minimum with which the producers will be content, is also, if competition is free and active, the maximum which they can expect. If the value of a commodity is such that it repays the cost of production not only with the customary, but with a higher rate of profit, capital rushes to share in this extra gain, and by increasing the supply of the article, reduces its value. This is not a mere supposition or surmise, but a fact familiar to those conversant with commercial operations. Whenever a new line of business presents itself, offering a hope of unusual profits, and whenever any established trade or manufacture is believed to be yielding a greater profit than customary, there is sure to be in a short time so large a production or importation of the commodity, as not only destroys the extra profit, but generally goes beyond the mark, and sinks the value as much too low as it had before been raised too high; until the over-supply is corrected by a total or partial suspension of further production. As already intimated,* these variations in the quantity produced do not presuppose or require that any person should change his employment. Those whose business is thriving, increase their produce by availing themselves more largely of their credit, while those who are not making the ordinary profit, restrict their operations, and (in manufacturing phrase) work short time. In this mode is surely and speedily effected the equalization, not of profits perhaps, but of the expectations of profit, in different occupations.
^ As a general rule, then, things tend to exchange for one another at such values as will enable each producer to be repaid the cost of production with the ordinary profit; in other words, such as will give to all producers the same rate of profit on their outlay. But in order that the profit may be equal where the outlay, that is, the cost of production, is equal, things must on the average exchange for one another in the ratio of their cost of production: things of which the cost of production is the same, must be of the same value. For only thus will an equal outlay yield an equal return. If a farmer with a capital equal to 1000 quarters of corn, can produce 1200 quarters, yielding him a profit of 20 per cent; whatever else can be produced in the same time by a capital of 1000 quarters, must be worth, that is, must exchange for, 1200 quarters, otherwise the producer would gain either more or less than 20 per cent.
Adam Smith and Ricardo have called that value of a thing which is proportional to its cost of production, its Natural Value
* Supra, p. 412.
(or its Natural Price). They meant by this, the point about which the value oscillates, and to which it always tends to return; the centre value, towards which, as Adam Smith expresses it, the market value of a thing is constantly gravitating; and any deviation from which is but a temporary irregularity, which, the moment it exists, sets forces in motion tending to correct it. On an average of years sufficient to enable the oscillations on one side of the central line to be compensated by those on the other, the market v'alue agrees with the natural value; but it very seldom coincides exactly with it at any particular time. The sea everywhere tends to a level; but it never is at an exact level; its surface is always ruffled by waves, and often agitated by storms. It is enough that no point, at least in the open sea, is permanently higher than another. Each place is alternately elevated and depressed; but the ocean preserves its level.
§ 2. The latent influence by which the values of things are made to conform in the long run to the cost of production is the variation that would otherwise take place in the supply of the commodity. The supply would be increased if the thing continued to sell above the ratio of its cost of production, and would be diminished if it fell below that ratio. But we must not therefore suppose it to be necessary that the supply should actually be either diminished or increased. Suppose that the cost of production of a thing is cheapened by some mechanical invention, or increased by a tax. The value of the thing would in a little time, if not immediately, fall in the one case, and rise in the other; and it would do so, because, if it did not, the supply would in the one case be increased, until the price fell, in the other diminished, until it rose. For this reason, and from the erroneous notion that value depends on the proportion between the demand and the supply, many persons suppose that this proportion must be altered whenever there is any change in the value of the commodity; that the value cannot fall through a diminution of the cost of production, unless the supply is permanently increased; nor rise, unless the supply is permanently diminished. But this is not the fact: there is no need that there should be any actual alteration of supply; and when there is, the alteration, if permanent, is not the cause, but the consequence of the alteration in value. If, indeed, the supply could not be increased, no diminution in the cost of production would lower the value: but there is by no means any necessity