Professor Macvane rejects our conception of the influence of
cost on value. He says: "It seems to involve a begging of the
question." "The principle of cost," he continues, "is too broad
to be admitted, by a side door, or as an afterthought. If the
reason why coats have a higher value than shoes be that coats
have a greater final utility, that ought to be the end of the
story. To add, as an incidental circumstance, that coats are also
more difficult to make and so ought to have a higher value, has
the appearance of putting the controlling factor in a curiously
subordinate place." I cannot quite understand this objection made
against us. I find that it is not our view which he criticizes.
We do not admit the principle of cost by a side door, but, on the
contrary, it is admitted without secrecy through the main portal
of our theory. One principle is that value is derived from
utility, and quite in harmony with this principle, we assert that
cost is, after all, according to the general law of value, that
of marginal utility, measured by utility alone.
But it should not be overlooked as, in my opinion, has been
done by Professor Macvane, that, in speaking of utility (and
marginal utility), we purposely put "the end of the story" a
little further back than Ricardo and the Ricardians. In the case
of the coat, as in the case of any other commodity, utility must
be considered in two ways: First, in so far as it is useful
itself; and, secondly, in so far as utility is attributed to the
labor, materials, etc., by means of which it is produced and by
means of which, at the same time, other commodities are produced.
If, at a given moment, the marginal utility of coats equals one
hundred, while the other commodities produced with the same means
of production, and consequently the requisite means of production
themselves, have a marginal utility of fifty, the result will be
an endeavor to produce more coats. Now since the manufacture of
these means a profitable utilization of the means of production,
this endeavor will continue until, by the increase of quantity,
the marginal utility of coats has likewise been reduced to fifty.
Then the value of the commodity and of the materials will become
identical, and not, indeed, by any accident, but by the
intentional realization of the most essential functions of
economic life. But it may also happen that so many coats cannot
be used, and consequently that an increase of production is not
called for. Coats will then maintain the value one hundred as
directly estimated by their marginal utility. But even in this
case their value will ultimately equal fifty or the cost-value,
if, at this value, they can be constantly and uninterruptedly
placed upon the market. This result, also, will not be
accidental, but the result of the general law of value-the "law
of marginal utility." Goods are not valued according to the
utility which they themselves possess when a lower utility is
dependent upon them, but according to this lower utility. In the
given case a man who loses his coat does not lose the utility of
one hundred, but only of fifty, which the requisite means of
production would have yielded if applied in other ways. This
utility is the marginal one and decisive for value.
(8)
"I am unable to conceive," Professor Macvane says, "of the
attribute of exchange value as belonging to the cost of products.
That would be to regard producers as carrying on a kind of
exchange with nature, giving productive exertions in return for
commodities.... But this way of looking at things does not seem
to promise very useful results."