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64 that;—a resolution to have the thing, if getting it does not involve the loss of a better thing. Price depends, therefore, not only on the cost of the commodity itself, but on its relation to the cost of every other attainable thing.

Farther. The power of choice is also a relative one. It depends not merely on our own estimate of the thing, but on everybody else's estimate; therefore on the number and force of the will of the concurrent buyers, and on the existing quantity of the thing in proportion to that number and force.

Hence the price of anything depends on four variables.

(1.) Its cost.

(2.) Its attainable quantity at that cost.

(3.) The number and power of the persons who want it.

(4.) The estimate they have formed of its desirableness.

Its value only affects its price so far as it is