Chapter V

, it will be remembered, we did not permit ourselves to derive the costs of producing cotton lint from the utility of cotton-seed. The refusal to do so was essential to clear thought; it led to some very useful practical corollaries. But to derive the cost of a commodity from the utility of something which is produced _with_ it, as part of the same productive process; and to derive the cost from the utilities which the agents, which help to produce it, possess for other purposes, are two entirely different things. In works on International Trade, the reader will discover that the comparative nature of real costs is so unmistakable that a Doctrine of Comparative Costs is expounded with much formality at the outset. This doctrine is apt to prove somewhat puzzling, when we have to deal with it as an apparent exception to the general tenor of economic theory. Its difficulties disappear when we realize clearly that the real cost of _anything_ is the curtailment of the supply of other useful things, which the production of that particular thing entails.

§2. _The Allocation of Resources_. However strange the above conception may seem, there should be no doubt that this cost is very "real." Here the irregularities and maladjustments of the economic world, the recurrence of trade depressions and the like, do much to obscure a clear vision of the essential realities. At a time when there is much unemployment, and much machinery standing idle, it is so clear to common sense that we _could_ produce more of some particular thing without diminishing the supply of other things, that any apparent statement to the contrary may perhaps seem the height of academic pedantry. But let me ask the reader to consider with an open mind a familiar parallel. During the recent war there was inevitably much waste and muddle in the utilization of the military resources of the Allies. Some regiments would be kept inactive for long periods, not for purposes of rest or training, but owing to some defect of organization. In the manufacture of munitions, an insufficient appreciation of the principles of joint demand led to the piling up of excessive stores of certain materials, which were useless until commensurate supplies of the complementary factors could be obtained. It is unnecessary to multiply examples. The waste of both man-power and material was immense. But the allocation of these resources between, for instance, the various theaters of war was none the less a very real problem, which gave rise to much engrossing controversy. It was an axiom that the more resources you employed in Mesopotamia or in Palestine, the less resources remained available for France. No one thought of maintaining that, as long as there was any waste of these resources, so long as there remained any men to be "combed out" of unessential industries, you could pour troops and munitions into Salonika without stopping to consider the needs of other theaters of war. Such a notion would have been clearly imbecile, for the sufficient reason that the sending of armies to Salonika would do nothing in itself to secure (however much it might incidentally stimulate) the more efficient use of the resources which remained.

Now this is precisely analogous to the problem of the allocation of our resources for the purpose of peace. Notwithstanding all the wastes and maladjustments of the economic system, the use of resources to produce one commodity _does_ in general curtail the production of others. The mere launching of a new business enterprise does no more than the sending of an army to Salonika, to eliminate waste in the remainder of the economic organism. Unemployment, broadly speaking, is a function not of the magnitude of the normal demand for labor (which affects rather the wage-level), but of fluctuations in the demand for labor; fluctuations from one day to another as at the docks, from one season to another as in the building trades, above all from one period of years to another as in the cycles of general trade boom and depression. Nothing will diminish unemployment which does not serve to diminish these fluctuations. A new business will not, as a rule, have any such effect. If it is launched during a trade depression (a most unusual proceeding), it may temporarily absorb unemployed labor and idle materials. But when the next boom comes, it will be using, though presumably to greater advantage, labor and materials which, but for it, would have been employed for other purposes. Meanwhile the causes making for unemployment will be unaffected. Miscalculations will still be made, the building trades will still become slack in the winter, the casual methods of engaging dock laborers will still continue, trade cycles will still recur, while beneath them, and concealed by them, some industries will expand and others will decay. Thus, like the armies at Salonika, the new business would in effect divert resources from elsewhere.

This truth needs to be firmly grasped in mind. It is this that makes it in general unsound policy to subsidize industries, either directly or indirectly, by means of a protective tariff. It is this, indeed, that supplies the answer to half the economic fallacies that are always current.

The allocation of resources so as to yield the maximum effect was rightly recognized as one of the most vital and difficult of our war-time problems. To cope with it, the Allied peoples devised one instrument after another, and finally evolved the Supreme Allied Council. The analogous problem in the economic world of peace time is no less important and far more difficult; but there is nothing to correspond to the Supreme Allied Council. There we rely upon a co-operation which, as was stressed in