corollary of this proposition is that there is a limit to the rental that anything can yield under any given condition. Below the present margin of utility of any goods there exist great quantities of free goods, unused goods, or unexploited uses. It is only uses above this margin that yield rent. Rent is the difference between the value of the better grades and the value of the free goods. It is therefore due to the limitation in the supply of indirect agents of the better quality, or to the scarcity of the more effective uses in those agents.
Restatement of rent, economic and contract
Economic rent is primary
5. Rent may be redefined as the value of the scarce uses of wealth within a given period. Rent is the felt importance of the usufructs of agents in securing gratification. It is measured by the marginal utility of any particular grade of agents in securing products. These definitions and the discussion throughout this chapter applies to economic rather than to contract rent. In fixing and agreeing on contract rent, men are seeking to estimate the importance of indirect goods, the importance that an agent will have in getting a product. They are bidding for the use of things, and what they bid is contract rent. Contract rent is based on the existence of economic rent. Economic rent does not depend on contract rent, but on the differences in the effectiveness of agents to secure a given product. If there were not differences in the product, and no limits to the supply of indirect agents, rent could not exist; it would be inconceivable. But these differences existing, economic rent inevitably arises, for men cannot keep from attaching value to the things that affect their desires. Contract rent in turn appears wherever the use of wealth becomes an object of exchange and agreement between men in a free society.
CHAPTER 11
REPAIR, DEPRECIATION, AND DESTRUCTION OF WEALTH: RELATION TO ITS SALE AND RENT
§ I. REPAIR OF RENT-BEARING AGENTS
The necessity of repairing nearly all economic agents
1. The continued rent of indirect agents is dependent on the continual repair of certain parts necessary for their efficiency. All earthly things wear out or decay. Whenever man's hand is withheld, nature takes possession of his work, regardless of his purposes. Dust gathers on unused clothes, and moths burrow in them. Shut up a house, and windows are shattered, roofs leak, and vermin swarm. To close a factory is to hasten the time when buildings and machinery will be piled upon the rubbish heap. The most magnificent and solid works of man have crumbled under the finger of time. The earth is strewn with ruins of gigantic engineering works, aqueducts, canals, temples, and monuments, whose restoration would be no less a task than was their first building. Everywhere vigilance and repairs are the conditions of continued uses of wealth. Some works of nature, such as waterfalls, may appear to have a continued use without repair, but they bear rent only when used with other things that must be constantly mended. A certain amount of labor on the banks of the mill-stream, and certain repairs on the dam, the water-wheel, and the gates are necessary. By a fiction in business contracts the waterfall may be dealt with apart from those conditions to its use, and may be rented, as a field is, with the agreement that the tenant keep up the repairs.
The efficiency of land as mere standing-room usually does not seem to be dependent on repairs. But here again the land yields rent in connection with other rent-bearing agents (such as houses and other agents above ground), which must be repaired. Standing-room on land is not a complete indirect agent; it is but one of the conditions for carrying on an industry, and even it often requires repairs to make it usable. Ranging from these extreme cases of stableness and durability, indirect agents vary to the extremes of fragility and ephemeralness.
The fertile lands of large regions have lost their usefulness
2. Most of the qualities that contribute to make land fertile in agriculture being destructible, the constant repair of tilled land is necessary to its continued fertility. If any things could be said to be indestructible, they would be some of the works of nature. In a sense, all matter is indestructible. Man cannot annihilate it, he can simply change its condition. But in economic discussion it is the value of things that is being considered, and from this point of view everything is in some degree destructible. The effects of bad husbandry are everywhere apparent, and in many regions fertile fields have been physically and economically destroyed. In Asia, lands that once supported millions, perhaps hundreds of millions, of population are now deserts. Egypt, for a time reduced to a semi-desert condition, has only in the past century been restored to a certain extent by the use of new methods and a return to the old ones. Many of the areas that were the granaries of Rome can now hardly support a sparse, half-starving population. The lands, or at any rate, the elements that gave them value, have been destroyed.
Wearing out of some American lands
Even in young America may be seen the effect of a failure to keep land in repair. As the new rich lands of the West were opened up, the old lands in the East were allowed to wear out, and many of them were abandoned. On the new lands in turn the same methods were followed, using up the first rich store of fertility with no attempt to keep up the quality of the soil. This may have been the best policy for the time; it would not have been economical to employ Old World methods of intensive husbandry when such rich extensive areas were being opened up. But the process was one destructive of natural resources. As settlement moved westward, great forests fell in ashes, and the soil was robbed of the fertile elements which it had taken centuries for nature to store up.
Wearing out of the parts the railroad
3. The machinery and appliances used in transportation and manufacturing are all perishable in varying degrees. Take as an example the great agency for transportation, the railway. The roadbed, which is but the natural soil excavated or filled to a better grade, is the most permanent part; yet every frost weakens, every rain undermines, a portion of it. Earthquake, landslide, and flood fill up the ditches, or tear down the embankments. Constant work is needed to keep it fit and safe for use. Above this is the track, slightly less permanent, more frequently changed. The ties rot, and even the rails of steel must be at times replaced. The rolling-stock is still less durable, and the different parts vary in length of life. It is said that the wheel-tires are renewed four times, the boiler three times, and the paint seven times, before a locomotive is entirely worn out. The oil used in the wheel, which is a necessary part of the running machine, has to be applied every day.
Depreciation of manufacturing appliances
There is a great difference in the length of life of manufacturing appliances. The building is fairly durable; yet an average depreciation-rate of one and one half per cent. a year must be allowed to offset a reduction in its value of over fifty per cent, in thirty years. Machinery differs greatly in durability; well-made, substantial machinery depreciates about five per cent. yearly. The engines and boilers depreciate more rapidly than the running gear; the loose tools have to be replaced every second to fourth year; while the materials consumed in the industry must be repaired and replaced at every repetition of the process of manufacture. If a factory is to be maintained in its efficiency in accordance with the terms of the renting contract, and is to continue its renting power, everything about it must be from time to time repaired and replaced.
Neglect of repairs often has evil effects
4. Neglect or
