by the Federal Reserve Bank of Chicago

“ What is Money? If money is viewed simply as a tool used to facilitate transactions, only those media that are readily accepted in exchange for goods, services, and other assets need to be considered. Many things — from stones to baseball cards — have served this monetary function through the ages. Today, in the United States, money used in transactions is mainly of three kinds — currency (paper money and coins in the pockets and purses of the public) ; demand deposits (non-interest bearing checking accounts in banks) ”

“ Intrinsically, a dollar bill is just a piece of paper, deposits merely book entries. Coins do have some intrinsic value as metal, but generally far less than their face value.
What, then, makes these instruments — checks, paper money, and coins — acceptable at face value in payment of all debts and for other monetary uses? Mainly, it is the confidence people have that they will be able to exchange such money for other financial assets and for real goods and services whenever they choose to do so.
Money, like anything else, derives its value from its scarcity in relation to its usefulness. ”

“ In the succeeding pages, the effects of various transactions on the quantity of money are described and illustrated. The basic working tool is the "T" account, which provides a simple means of tracing, step by step, the effects of these transactions on both the asset and liability sides of bank balance sheets. Changes in asset items are entered on the left half of the "T" and changes in liabilities on the right half. For any one transaction, of course, there must be at least two entries in order to maintain the equality of assets and liabilities. ”

“ The distribution between the currency and deposit components of money depends largely on the preferences of the public. When a depositor cashes a check or makes a cash withdrawal through an automatic teller machine, he or she reduces the amount of deposits and increases the amount of currency held by the public. Conversely, when people have more currency than is needed, some is returned to banks in exchange for deposits. ”

“ Control of the quantity of money is essential if its value is to be kept stable. Money's real value can be measured only in terms of what it will buy. Therefore, its value varies inversely with the general level of prices. Assuming a constant rate of use, if the volume of money grows more rapidly than the rate at which the output of real goods and services increases, prices will rise. ”

“ While currency is used for a great variety of small transactions, most of the dollar amount of money payments in our economy are made by check or by electronic transfer between deposit accounts. Moreover, currency is a relatively small part of the money stock. About 69 percent, or $623 billion, of the $898 billion total stock in December 1991, was in the form of transaction deposits, of which $290 billion were demand and $333 billion were other checkable deposits.
What Makes Money Valuable? In the United States neither paper currency nor deposits have value as commodities. ”

“ A user may sense that money must come into being either automatically as a result of economic activity or as an outgrowth of some government operation. But just how this happens all too often remains a mystery. ”

“ The reader should be mindful that deposits and reserves tend to expand simultaneously and that the Federal Reserve's control often is exerted through the market place as individual banks find it either cheaper or more expensive to obtain their required reserves, depending on the willingness of the Fed to support the current rate of credit and deposit expansion. ”

“ But if, on the other hand, growth in the supply of money does not keep pace with the economy's current production, then prices will fall, the nations's labor force, factories, and other production facilities will not be fully employed, or both. ”