Value is power in exchange. The value of money is its power in exchange. The value of money just like the value of anything else depends upon the demand for it and the supply of it. Its value depends upon its marginal utility. If the supply of money is increased, the demand remaining the same, the marginal utility of money is lowered and its value is lessened, and if the supply is decreased, the marginal utility rises and with it the value. On the other hand, if the demand for money increases, the marginal utility rises and with it the value of the money, and if the demand decreases, its marginal utility and likewise its value falls. When the value of money falls, if all other values remain practically the same, the prices of all other commodities rise, for the prices of commodities are the reciprocals of the value of money. If the value of money rises, and all other values remain approximately the same, the prices of all commodities fall. Likewise, if the value of money remains constant, and all other values increase, the prices of all commodities will increase. If all values other than the value of money fall, all prices will fall.