Money: At the Center of Transactions

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Money can serve as:
- store of value, which means people can save it and use it later—smoothing their purchases over time;
- unit of account, that is, provide a common base for prices; or
- medium of exchange, something that people can use to buy and sell from one another.
Practical contrast with barter:
- Without money, economies revert to barter, requiring a direct coincidence of wants (e.g., a car mechanic needing to find a farmer who needs car repairs).
- Money eliminates the need to find a particular trading partner and enables specialization, increasing production and demand for transactions and, hence, demand for money.

Many items have been used as money: cowry shells, barley, peppercorns, mobile phone minutes in developing economies, gold, and silver.
Desirable attributes that made precious metals effective money:
- durable store of value;
- stable unit of account;
- convenient medium of exchange;
- limited supply and high replacement cost;
- easily divisible into standardized units and portable.
Limitations of other goods as money:
- perishability (e.g., strawberries);
- difficulty of divisibility and standardization;
- alternative consumption value sets a floor for worth (e.g., barley or peppercorns could be consumed).

Evolution:
- Deposit of precious metals at banks led to paper claims on deposits.
- When the paper claim was delinked from the metal, fiat money was born.
Characteristics of fiat money:
- materially worthless but has value because people collectively agree to ascribe value to it;
- for government-issued currency, tax requirements create a guaranteed source of demand;
- for other forms (such as cryptocurrencies), value depends on collective belief.
Policy dilemma with fiat money:
- Governments face a temptation to issue money to finance spending, risking inflation.
- Printing too much money can erode trust and lead to hyperinflation if expectations are not managed.
- To limit this temptation, most countries delegate monetary issuance decisions to independent central banks that do not transfer funds to the government to finance its spending.
Note: Most money today is in the form of bank deposits rather than paper currency.

Official measurement: broad money, encompassing everything that provides a store of value and liquidity.
Liquidity definition: the extent to which financial assets can be sold at close to full market value at short notice (easily converted into another form of money, such as cash).
Components that the IMF (2000) says can be counted as broad money:
- National currencies (generally issued by the central government).
- Transferable deposits, which include demand deposits (transferable by check or money order); bank checks (if used as a medium of exchange); traveler’s checks (if used for transactions with residents); and deposits otherwise commonly used to make payments (such as some foreign-currency deposits).
- Other deposits, such as nontransferable savings deposits, term deposits (funds left on deposit for a fixed period of time), or repurchase agreements (in which one party sells a security and agrees to buy it back at a fixed price).
- Securities other than shares of stock, such as tradable certificates of deposit and commercial paper (which is essentially a corporate IOU).

Relationship between money supply and prices:
- If money supply tightens (e.g., not enough gold to mint new money), prices can fall—deflation.
- If money supply increases while demand for goods stays the same, the value of money drops—inflation.
Confidence in money is essential:
- High inflation can erode confidence, leading people to adopt a more stable currency (de facto dollarization).
- Dollarization implies the government loses its monopoly on issuing money and can be very difficult to reverse.
Historical policy actions to restore confidence:
- Turkey rebased the currency, eliminating six zeros in 2005. Overnight, 1,000,000 liras became 1 lira.
- Brazil introduced a new currency in 1994, the real.
- These cases illustrate that if everyone accepts a new denomination or currency, it functions as money.

Money’s effectiveness depends on three interrelated functions: store of value, unit of account, and medium of exchange.
The form of money has evolved from barterable goods to precious metals to fiat money; each stage changed how supply and demand for money affect prices.
Managing money supply requires institutions and credibility:
- Independent central banks are used to mitigate political temptation to over-issue money.
- Maintaining public belief in currency is crucial; loss of confidence can produce dollarization or hyperinflation.
Measuring money through broad money captures various liquid and store-of-value instruments, following the definitions in IMF (2000).

F&D Magazine: "Money: At the Center of Transactions" — Ceyda Oner and Irena Asmundson