The wage fund theory, though badly shaken as a result of Mill’s defection, was not abandoned by all the Classical writers, and some recent American publications have attempted a revival of it.[771]
(6) The Law of Rent. The law of competition tends to reduce the selling price until it is equal to the cost of production. But suppose, as is often the case, that there are two costs of production, which of the two will determine the price? The higher will be the determinant, and so there exists a margin for all similar products whose cost of production is less. Ricardo showed that this was the case with agricultural products as well as with certain manufactured goods.[772] Mill included personal ability, and though the conception of rent was thus very considerably extended, it had not the scope which it had with Senior.
(7) The Law of International Exchange. According to the Liberal economists Ricardo and Dunoyer (see [p. 346]), international trade is subject to the laws regulating individual exchange, and the results in the two cases are almost identical, namely, a saving of labour to both parties. One party exchanges a product which has cost fifteen hours’ labour for another which, had an attempt been made to produce it directly, would have involved a labour of twenty hours. The gain is credited to the importing side, for exportation is merely the means whereby it is obtained. Its measure is the excess of the imported value over the value exported.
It is clear that each party gains by the transaction. It is not quite clear, nor is it altogether probable, that the advantages are equally distributed. But it is generally believed that if any inequality does exist the greater gain goes to the poorer country—to the one that is less gifted by nature or less fitted for industrial life. The latter country by very definition would experience great difficulty in attempting the direct production of the imported goods, and would even, perhaps, find it quite impossible. On this point the English Classical or the Manchester school is in complete agreement with the French school.[773]
It might possibly be pointed out that under a régime of free competition all values would be reduced to the level of cost of production, and products would be exchanged in such a fashion that a given quantity of labour embodied in one commodity would always exchange for an equal quantity embodied in any other. But in such a case where would be the advantage of exchanging? Ricardo had already anticipated this objection, and had shown that if the rule of equal quantity in exchange for equal quantity were true of exchange between individuals, it did not hold of exchange between different countries, for the equalising action of competition no longer operated, because of the difficulty of moving capital and labour from one to the other. A comparison should be made, not of the respective costs of the same product in the two countries, but of the respective costs of the imported and the exported products in the same country. Another buttress to strengthen the theory which measures the advantages of international commerce by the amount of labour economised![774]
But the value of the exchanged product is still undetermined. It lies somewhere between the real cost of production of the goods exported and the virtual cost of production of the goods imported, in such a way that each country gains something. That is all we are able to say. Mill has gone a step farther. He has abandoned the comparison of costs of production, which is purely abstract, and can afford no practical measure of the advantages, preferring to measure the value of the imported product by the value of the product which must be given in exchange for it.[775] We require to find the causes that enable a country like England to obtain a greater or a lesser quantity of wine in exchange for her coal. In other words, the law of international values no longer involves a comparison of costs of production, but is simply the law of demand and supply. The prices of the two goods arrange themselves in such a fashion that the quantities demanded by the respective countries exactly balance. If there is a greater demand for coal in France than there is for wine in England, England will obtain a great quantity of wine in exchange for her coal, and will consequently find herself in a very advantageous position.
Mill’s theory[776] constitutes a real advance as compared with Ricardo’s, for it affords a means of gauging the strength of the foreign demand, and of judging of the circumstances favourable to a good bargain. Mill was of the opinion that a poor country stood to benefit most by the transaction—thus confirming Bastiat’s belief. A rich country will always have to pay more for its goods than a poor one.[777]
Protectionists affect the opposite belief, holding that it is the poor country that is duped. The English trade with Portugal is one of their favourite illustrations. But it is simply an illustration, and it can never take the place of actual proof.
Notwithstanding these divergent views, Mill is more sympathetic to the Protectionists than any other economist of the Liberal school. His theory provides them with at least one excellent argument. Seeing that the advantages of international commerce depend upon demand and supply, a country may make it operate to its own advantage by merely pursuing a different policy. New industries might be developed whenever there is a considerable demand for new products, and that demand might easily be so considerable that the price would be lowered.[778] Mill recognises the justice of merely temporary protection, set up with a view to naturalising a new industry, and considers it logically deducible from his principles.[779]
Although Mill may in this way have done something to lighten the task of the Protectionists, we must never forget that he himself remained an entirely faithful adherent of the Free Trade doctrine and, except in the case of infant industries, vigorously denounced all protective rights. “All is sheer loss.… They prevent the economy of labour and capital, thereby annihilating a general gain to the world which would be shared in some proportion between itself and other countries.”[780]