MONEY FUNCTIONS: Any item used as money in an economy performs automatically takes on four basic functions: (1) medium of exchange, (2) measure of value, (3) store of value, and (4) standard of deferred payment. While "buying and selling" means that money is THE medium of exchange, by far THE most important function of money, money also performs measure of value, store of value, and standard of deferred payment functions. Measure of value, also termed unit of account, means that prices are stated in terms of money. Store of value means that value, the satisfaction of wants and needs, can be stored over time using money. Standard of deferred payment means that future payments, such as paying off a car loan, are also in terms of the monetary unit.

     See also | money | medium of exchange | measure of value | unit of account | store of value | standard of deferred payment | money characteristics | barter |

MONEY FUNCTIONS, AmosWEB GLOSS*arama, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: November 12, 2025].

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The change in total revenue resulting from a change in the quantity of output sold. Marginal revenue indicates how much extra revenue a firm receives for selling an extra unit of output. It is found by dividing the change in total revenue by the change in the quantity of output. Marginal revenue is the slope of the total revenue curve and is one of two revenue concepts derived from total revenue. The other is average revenue. To maximize profit, a firm equates marginal revenue and marginal cost.

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