Money and its function

Although the crucial feature of money is its acceptance as the means of payment or medium of exchange, money has other functions. It serves as a standard of value, a unit of account, a store of value and as a standard of deferred payment.

Money, the medium of exchange, is used in one -half of almost all exchange. Workers exchange labor services for money. People buy and sell goods in exchange for money. We accept money not to consume it directly but because it can subsequently be used to buy things we do wish to consume. Money is the medium through, which people exchange goods and services.

To see that society benefits from a medium of exchange, imagine a baiter economy.

Money can also serve as a standard of value. Society considers it convenient to use a monetary unit to determine relative costs of different goods and services. In this function money appears as the unit of account, is the unit in which prices are quoted and accounts are kept.

In Russia prices are quoted in rubbles; in Britain, in pounds sterling; in the USA, in US dollars; in France, in French francs. It is usually convenient to use the units in which the medium of exchange is measured as the unit of account as well. However there are exceptions. During the rapid German inflation of 1922 - 1923 when prices in marks were changing very quickly, German shopkeepers found it more convenient to use dollars as the unit of account. Prices were quoted in dollars even though payment was made in marks, the German medium of exchange.

Money is a store of value because it can be used to make purchases in the future.

To be accepted in exchange, money has to be a store of value. Nobody would accept money as payment for goods supplied today if the money was going to be worthless when they tried to buy goods with it tomorrow. But money is neither the only nor necessarily the best store of value. Houses, stamp collections, and interest-bearing bank accounts all serve as stores of value. Since money pays no interest and its real purchasing power is eroded by inflation, there are almost certainly better ways to store value.

Finally, money serves as a standard of deferred payment or a unit of account over time. When you borrow, the amount to be repaid next year is measured in pounds sterling or in some other hard currency. Although convenient, this is not an essential function of money. UK citizens can get bank loans specifying in dollars the amount that must be repaid next year. Thus the key feature of money is its use as a medium of exchange. For this, it must act as a store of value as well. And it is usually, though not invariably, convenient to make money the unit of account and standard of deferred payment as well.

There are different kinds of money. In prisoner-of-war camps, cigarettes served as money. In the 19^th century money was mainly gold and silver coins. These are examples of commodity money, ordinary goods with industrial uses (gold) and consumption uses (cigarettes), which also serve as a medium of exchange. To use a commodity money, society must either cut back on other uses of that commodity or devote scarce resources to producing additional quantities of the commodity. But there are less expensive ways for society to produce money.

A token money is a means of payment whose value or purchasing power as money greatly exceeds its coast of production or value in uses other than as money. The essential condition for the survival of token money is the restriction of the right to supply it. Private production is illegal. In modern economies, token money is supplemented by IOU money. An IOU money is a medium of exchange based on the debt of a private firm or individual. A bank deposit is IOU money because it is a debt of the bank. When you have a bank deposit the bank owes you money. You can write a cheque to yourself or a third party and the bank is obliged to pay whenever the cheque is presented. Bank deposits are a medium of exchange because they are generally accepted as payment.