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might cost double or treble as much per quarter as the former supply. If the first hundred quarters were all raised at the same expense (only the best land being cultivated); and if that expense would be remunerated with the ordinary profit by a price of 208, the quarter; the natural price of wheat, so long as no more than that quantity was required, would be 208. ; and it could only rise above, or fall below that price, from vicissitudes of seasons, or other casual variations in supply. But if the population of the district advanced, a time would arrive when more than a hundred quarters would be necessary to feed it. We must suppose that there is no access to any foreign supply. By the hypothesis, no more than a hundred quarters can be produced in the district, unless by either bringing worse land into cultivation, or altering the system of culture to a more expensive one. Neither of these things will be done without a rise in price. This rise of price will gradually be brought about by the increasing demand. So long as the price has risen, but not risen enough to repay with the ordinary profit the cost of producing an additional quantity, the increased value of the limited supply partakes of the nature of a scarcity value. Suppose that it will not answer to cultivate the second best land, or land of the second degree of remoteness, for a less return than 25s. the quarter; and that this price is also necessary to remunerate the expensive operations by which an increased produce might be raised from land of the first quality. If so, the price will rise, through the increased demand, until it reaches 258. That will now be the natural price; being the price without which the quantity, for which society has a demand at that price, will not be produced. At that price, however, society can go on for some time longer; could go on perhaps for ever, if population did not increase. The price, having attained that point, will not again permanently recede (though it may fall temporarily from accidental abundance); nor will it advance further, so long as society can obtain the supply it requires without a second increase of the cost of production. I have made use of Price in this reasoning, as a convenient symbol of Value, from the greater familiarity of the idea; and I shall continue to do so as far as may appear to be necessary. In the case supposed, different portions of the supply of corn have different costs of production. Though the 20, or 50, or 150 quarters additional have been produced at a cost proportional to 258, the original hundred quarters per annum are still produced at a cost only proportional to 20s. This is self-evident, if the original and the additional supply are produced on different qualities of land. It is equally true if they are produced on the same land. Suppose that land of the best quality, which produced 100 quarters at 20s, has been made to produce 150 by an expensive process, which it would not answer to undertake without a price of 25s. The cost which requires 25s. is incurred for the sake of 50 quarters alone : the first hundred might have continued for ever to be produced at the original cost, and with the benefit, on that quantity, of the whole rise of price caused by the increased demand : no one, therefore, will incur the additional expense for the sake of the additional fifty, unless they alone will pay for the whole of it. The fifty, therefore, will be produced at their natural price, proportioned to the cost of their production; while the other hundred will now bring in 58, a quarter more than their natural price—than the price corresponding to, and sufficing to remunerate, their lower cost of production. If the production of any, even the smallest, portion of the supply, requires as a necessary condition a certain price, that price will be obtained for all the rest. We are not able to buy one loaf cheaper than another because the corn from which it was made, being grown on a richer soil, has cost less to the grower. The value, therefore, of an article (meaning its natural, which is the same with its average value) is determined by the cost of that portion of the supply which is produced and brought to market at the greatest expense. This is the Law of Value of the third of the three classes into which all commodities are divided.
§ 2. If the portion of produce raised in the most unfavourable circumstances, obtains a value proportioned to its cost of production; all the portions raised in more favourable circumstances, selling as they must do at the same value, obtain a value more than proportioned to their cost of production. Their value is not, correctly speaking, a scarcity value, for it is determined by the circumstances of the production of the commodity, and not by the degree of dearness necessary for keeping down the demand to the level of a limited supply. The owners, however, of those portions of the produce enjoy a privilege; they obtain a value which yields them more than the ordinary profit. If this advantage depends upon any special exemption, such as being free from a tax, or upon any personal advantages, physical or mental, or any peculiar process only known to themselves, or upon the possession of a greater capital than other people, or upon various other things which might be enumerated, they retain it to themselves as an extra gain, over and above the general profits of capital, of the nature, in some sort, of a monopoly profit. But when, as in the case which we are more particularly considering, the advantage depends on the possession of a natural agent of peculiar quality, as for instance of more fertile land than that which determines the general value of the commodity; and when this natural agent is not owned by themselves; the person who does own it, is able to exact from them, in the form of rent, the whole extra gain derived from its use. We are thus brought by another road to the Law of Rent, investigated in the concluding chapter of the Second Book. Rent, we again see, is the difference between the unequal returns to different parts of the capital employed on the soil. Whatever surplus any portion of agricultural capital produces, beyond what is produced by the same amount of capital on the worst soil, or under the most expensive mode of cultivation, which the existing demands of society compel a recourse to ; that surplus will naturally be paid as rent from that capital, to the owner of the land on which it is employed. It was long thought by political economists, among the rest even by Adam Smith, that the produce of land is always at a monopoly value, because (they said) in addition to the ordinary rate of profit, it always yields something further for rent. This we now see to be erroneous. A thing cannot be at a monopoly value, when its supply can be increased to an indefinite extent if we are only willing to incur the cost. If no more corn than the existing quantity is grown, it is because the value has not risen high enough to remunerate any one for growing it. Any land (not reserved for other uses, or for pleasure) which at the existing price, and by the existing processes, will yield the ordinary profit, is tolerably certain, unless some artificial hindrance intervenes, to be cultivated, although nothing may be left for rent. As long as there is any land fit for cultivation, which at the existing price cannot be profitably cultivated at all, there must be some land a little better, which will yield the ordinary profit, but allow nothing for rent: and that land, if within the boundary of a farm, will be cultivated by the farmer; if not so, probably by the proprietor, or by some other person on sufferance. Some such land at least, under cultivation, there can scarcely fail to be. Rent, therefore, forms no part of the cost of production which determines the value of agricultural produce. Circumstances no doubt may be conceived in which it might do so, and very largely too. We can imagine a country so fully peopled, and with all its cultivable soil so completely occupied, that to produce any additional quantity would require more labour than the produce would feed: and if we suppose this to be the condition of the whole world, or of a country debarred from foreign supply, then, if population continued increasing, both the land and its produce would really rise to a monopoly or scarcity price. But this state of things never can have really existed anywhere, unless possibly in some small island cut off from the rest of the world; nor is there any danger whatever that it should exist. It certainly exists in no known region at present. Monopoly, we have seen, can take effect on value, only through limitation of supply. In all countries of any extent there is more cultivable land than is yet cultivated ; and while there is any such surplus, it is the same thing, so far as that quality of land is concerned, as if there were an infinite quantity. What is practically limited in supply is only the better qualities; and even for those, so much rent cannot be demanded as would bring in the competition of the lands not yet in cultivation; the rent of a piece of land must be somewhat less than the whole excess of its productiveness over that of the best land which it is not yet profitable to cultivate ; that is, it must be about equal to the excess above the worst land which it is profitable to cultivate. The land or the capital most unfavourably circumstanced among those actually employed, pays no rent; and that land or capital determines the cost of production which regulates the value of the whole produce. Thus rent is, as we have already seen, no cause of value, but the price of the privilege which the inequality of the returns to different portions of agricultural produce confers on all except the least favoured portion. Rent, in short, merely equalizes the profits of different farming capitals, by enabling the landlord to appropriate all extra gains occasioned by superiority of natural advantages. If all landlords were unanimously to forego their rent, they would but transfer it to the farmers, without benefiting the consumer; for the existing price of corn would still be an indispensable condition of the production of part of the existing supply, and if a part obtained that price the whole would obtain it. Rent, therefore, unless artificially