On the other hand, the present value of a field of grain or the young orchard is dependent upon its utility in meeting a future want. Everything which enhances prospective utility of any article enhances its value; and everything which diminishes the chance of such utility, like bad weather, insects or plant diseases, diminishes the present value. In this way risk diminishes the value of wealth subject to it and increases the value of wealth which has passed by it.
In general, the usefulness of anything is no criterion for measuring value, because other elements of value are more important. Henry C. Carey says, "Utility is the measure of man's power over nature; value is the measure of nature's power over man." This may be a striking way of saying that great utility implies a discovery of uses, while great value often indicates only difficulty in securing what has great usefulness.
_Exertion as related to value._--Since utility, however essential to value, is not its measure, we are led to consider whether the exertion required to obtain any article desired may not measure its worth. This is certainly a matter of prime consideration, and many have been led to suppose the cost of production, by which is meant all the exertion necessary to bring any commodity to its final consumer, to be the sole and absolute measure of value.
This supposition, if ever correct, is subject to great modifications. None know better than farmers that a bushel of wheat from one field may have cost twice as much as a bushel from another field, without any possible distinction in value. Every mechanic knows that what he has accomplished with great exertion may have been duplicated by some labor-saving device with half the exertion, the two values being essentially equal. Nothing is more common than to find articles in the market sold without regard to cost because they are superseded by more desirable articles. Indeed, the most ardent defender of cost as the sole basis of value is obliged to notice multitudes of exceptions to the rule. Yet it must be granted that only those articles involving effort in securing them have value at all, and in general the amount of effort actually put forth has some relation to our estimate of value.