Читать книгу The Principles of Economics, with Applications to Practical Problems - Frank A. Fetter - Страница 49

Does not mean declining prosperity

1. The phrase diminishing returns is sometimes taken as meaning merely a decrease in prosperity. Many ideas are connected with this phrase. It is not self-explanatory. It suggests various thoughts according to context and these have not failed to give rise to different uses. The student must be cautious if he is to think clearly about it. If population declines, or industry changes from one place to another, or from one kind of goods to another, it is sometimes said that returns are diminishing in the deserted district.

Nor exhaustion of the soil

2. A more common misuse of the term is to apply it to the exhaustion of the soil. If the soil of a district has been robbed of its fertile qualities and smaller crops are raised than was the case fifty years before, it is said to be a case of of the increased difficulty in the extraction of natural stores in mining. The veins near the surface being mined first, later the galleries must be cut deeper and greater expense incurred to get the stores. But the conditions here are very different from those we have considered under diminishing returns. Mines are used not under the renting contract, but under the royalty contract, which permits and contemplates a progressive using up of the limited stores of natural resources.

Fallacious contract between manufacture and agriculture

All industries if limited as to one factor, as area, show diminishing returns

3. Manufactures are often said to show increasing returns in contrast with agriculture as an industry of decreasing returns. There is here an inconsistent shifting of thought. Agriculture is thought of as limited to a certain area of ground, whereon evidently diminishing returns will take place. But the fixed limit of ground-space is not thought of in connection with manufactures. Taking the same view of manufactures, commerce, education, etc., that is, assuming each industry to be confined to limited area of ground, each is seen to be subject to diminishing returns. Some ground-space is one of the essentials to carry on any business. If the attempt is made to accumulate a large library in one small room, a point is reached where much energy is wasted in trying to find the books. In a university the psychical product, education, may be limited by the need of space. The school-room, laboratory, or college class-room could be used at midnight, it is true, but not conveniently; and as students increase, buildings must be added. The same is true of any industry. We cannot conveniently increase the business of a lumber-yard without a larger yard-space, or of a factory without a larger floor-space. But the added space may be gotten by spreading horizontally or piling up perpendicularly. A ten-story building on an acre lot represents ten acres of floor-space. Putting up higher buildings is an expansion in area by the more intensive utilization of the land. Devices like elevators, and more compact appliances, make possible an increasing business in manufacture, trade, or commerce upon the same area of land. All industries, if looked at consistently from this standpoint, are subject to the same condition, though it is true this will make itself felt in varying degrees in different lines of industry. In agriculture some similar devices are possible by the use of greenhouses, but it is true that in it, on account of the need of sun, light, and air, the limits of space are more quickly felt, and are less elastic than in most other industries. The difference, however, is one of degree, and not of kind. Higher factories, larger stores, enable manufacturers to adapt themselves to the law as applied to the surface of land, but not to escape its operations. Neither the law of gravitation nor the law of diminishing returns is violated or broken when materials are lifted to build the upper stories. Both "laws" are at work, even when the building is rising from the ground. Men are merely adapting their conduct to the conditions imposed by gravitation and diminishing returns.

Confused with the question of large production

Manufactures usually are thought of as enlarging by increase of the amount of capital employed, without limitation as to the area covered. But even here a limit is reached in the amount of capital that can be employed at any one location because of the difficulty of widening the market. The question, however, is one of the advantages of large production with large capital, not of the increasing use of a limited area of land. If manufactures and agriculture are to be compared with reference to their economic nature, it is essential to clear thinking that both be looked at with reference to the same conditions, and from the same point of view.

Technical confused with historical diminishing returns

4. Technical diminishing returns are often confused with historical diminishing returns. The principle of technical diminishing returns is that at any given moment the uses obtainable from any indirect agent cannot be indefinitely increased without increasing difficulty. Historical diminishing returns occur when, in fact, human effort is less bountifully rewarded in a later period than in an earlier one. If to-day a day's labor in agriculture produced less than fifty years ago, historical diminishing returns would have occurred. In fact, labor is more bountifully rewarded in agriculture than fifty years ago, yet it is true to-day that there are few fields or appliances which, if used more intensively with the prevailing prices of labor and material, would not show a diminishing return to the additional capital applied. Therefore, in the historical sense, increasing returns have prevailed, yet at every moment it has been necessary to apply resources under the guidance of the principle of diminishing returns.