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Determination of price is an essential condition for justice in exchange, efficient allocation of resources, economic growth, welfare and justice. The most important and essential function of a medium of exchange is to be widely acceptable and have relatively stable purchasing power (real value). The following characteristics are essential:
Shell money is a medium of exchange similar to coin money and other forms of commodity money, and was once commonly used in many parts of the world. [1] Shell money usually consisted of whole or partial sea shells, often worked into beads or otherwise shaped.
Marx regards exchange-value as the proportion in which one commodity is exchanged for other commodities. For Marx, exchange-value is not identical to the money price of a commodity. Actual money prices (or even equilibrium prices) will only ever roughly correspond to exchange-values. The relationship between exchange-value and price is ...
A currency [a] is a standardization of money in any form, in use or circulation as a medium of exchange, for example banknotes and coins. [1] [2] A more general definition is that a currency is a system of money in common use within a specific environment over time, especially for people in a nation state. [3]
When money is used to intermediate the exchange of goods and services, it is performing a function as a medium of exchange. It thereby avoids the inefficiencies of a barter system, such as the inability to permanently ensure "coincidence of wants". For example, between two parties in a barter system, one party may not have or make the item that ...
Examples of commodities that have been used as media of exchange include precious metals and stones, grain, animal parts (such as beaver pelts), tobacco, fuel, and others. Sometimes several types of commodity money were used together, with fixed relative values, in various commodity valuation or price system economies.
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According to the Cambridge cash-balance theory, which is represented by the Cambridge equation, money's ability to store value is more important than its function as a medium of exchange. [8] Cambridge claims that the demand for money is derived from its ability to store value.