Money and Its Role in the Economy

Definition and Importance of Money

Money is a fundamental economic invention that facilitates exchange, specialization, and economic growth. Economists define money as any asset that people are generally willing to accept in exchange for goods and services or for payment of debts.

• Asset: Anything of value owned by a person or a firm.

• Money allows for efficient trade and the development of complex economies.

Functions of Money

Money serves four primary functions in the economy:

1. Medium of Exchange: Accepted by a wide variety of parties as payment for goods and services.

2. Unit of Account: Provides a standard measure of value, making price comparisons possible.

3. Store of Value: Allows individuals to defer consumption by storing purchasing power for future use. Money is especially effective because it is liquid (easily exchanged for goods).

4. Standard of Deferred Payment: Facilitates exchanges across time, as its value is expected to be predictable in the future.

What Can Serve as Money?

For an asset to function as money, it should possess the following characteristics:

• Acceptable to most people

• Standardized quality (any two units are alike)

• Durable (does not wear out easily)

• Valuable relative to its weight (easily transported)

• Divisible (usable for both small and large transactions)

Types of Money

• Commodity Money: Has value independent of its use as money (e.g., gold, silver, cowrie shells, animal pelts, cigarettes in prisons).

• Paper Money and Fiat Money: Paper money originated as a claim on commodities (like gold), but modern economies use fiat money, which is authorized by a central bank and not backed by a physical commodity.

Fiat money is only valuable as long as people have confidence in its purchasing power. If confidence is lost, fiat money ceases to function effectively.

The U.S. Money Supply

Measuring Money: M1 and M2

The money supply is measured using two main aggregates:

• M1: Currency in circulation, checking account deposits, and savings account deposits.

• M2: Includes all of M1 plus small-denomination time deposits and noninstitutional money market fund shares.

As of September 2023, M1 was about $18.1 trillion and M2 about $20.8 trillion. U.S. currency holdings are high by world standards, partly due to international use and underground economic activity.

Debit, Credit Cards, and Bitcoin

• Debit cards access checking accounts but are not money themselves; the account balance is money.

• Credit cards represent short-term loans, not money; transactions are not complete until the loan is repaid.

• Bitcoin and e-money: Not currently included in M1 or M2, as they are not widely accepted as a medium of exchange or issued by governments.

The Role of Banks in the Economy

Bank Functions and Balance Sheets

Banks are profit-making firms that play a critical role in the creation of money. They accept deposits and make loans, using a fractional reserve banking system (keeping less than 100% of deposits as reserves).

Additional info: Table values are illustrative and may not match actual bank data.

Reserves and Required Reserves

• Reserves: Deposits kept as cash in the bank's vault or with the Federal Reserve.

• Previously, U.S. banks were required to hold a fraction of deposits as required reserves, but this requirement was eliminated in March 2020.

Economic Importance of Bank Lending

• Banks reduce transaction costs and information problems (asymmetric information) through economies of scale and statistical analysis.

• They facilitate lending and borrowing more efficiently than individuals could on their own.

Fintech and Interest Rate Ceilings

• Financial technology (fintech) firms offer peer-to-peer lending but may facilitate riskier loans.

• Proposals to cap credit card interest rates could make loans less accessible to high-risk borrowers.

How Banks Create Money

The Money Creation Process

Banks create money through the process of accepting deposits and making loans. This process is illustrated using T-accounts:

• When a deposit is made, reserves and deposits increase by the same amount.

• When a loan is made, a portion of reserves is lent out, creating new deposits elsewhere in the banking system.

This process leads to the multiple expansion of deposits, described by the money multiplier:

The money multiplier can fluctuate due to changes in reserve holdings and the amount of currency held by the public.

The Federal Reserve System

Structure and Functions

• The Federal Reserve System (the Fed) is the central bank of the United States, established in 1914.

• It consists of the Board of Governors (7 members, Washington, DC) and 12 regional Federal Reserve districts.

• The Federal Open Market Committee (FOMC) manages open market operations and the money supply.

Bank Runs, Panics, and Regulation

• A bank run occurs when many depositors withdraw funds simultaneously due to fears about a bank's solvency.

• A bank panic is when multiple banks experience runs at the same time.

• The Fed acts as a lender of last resort to prevent panics and stabilize the system.

• The Federal Deposit Insurance Corporation (FDIC) insures deposits up to $250,000, reducing the risk of bank runs.

Monetary Policy and Open Market Operations

• Monetary policy: Actions by the Fed to manage interest rates and pursue macroeconomic objectives.

• Open market operations: The buying and selling of U.S. Treasury securities to control the money supply.

To increase the money supply, the Fed conducts an open market purchase of securities. To decrease the money supply, the Fed conducts an open market sale of securities.

Money, Inflation, and the Quantity Theory

The Quantity Theory of Money

The quantity theory of money links the money supply to the price level and inflation:

• If the money supply grows faster than real GDP, inflation occurs.

• If the money supply grows slower than real GDP, deflation occurs.

• If both grow at the same rate, the price level is stable.

Hyperinflation

• Very high inflation rates (over 50% per month) are called hyperinflation.

• Hyperinflation is usually caused by rapid increases in the money supply, often when governments finance spending by creating money.

• Recent examples include Zimbabwe (2000s) and Venezuela (2019).

Sample Questions and Applications

• Is cash in your pocket counted in M1? Yes, currency in circulation is part of M1.

• Are checking account funds in M1? Yes, checking account balances are included in M1.

• Are savings account funds in M1? No, savings accounts are not in M1 but are included in M2.

• Is Bitcoin in M1 or M2? No, cryptocurrencies are not part of the official money supply.

• Are credit cards in M1 or M2? No, credit cards are not money; they represent short-term loans.

• What happens to M1 if you withdraw $100 in cash from your checking account? No change; both checking deposits and currency are in M1, so the total remains the same.

• What happens if you deposit $2,000 in cash into your checking account? No net change in the money supply initially; currency decreases by $2,000, checking deposits increase by $2,000.

• What happens when the bank lends out part of your deposit? The money supply increases by the amount of the new loan (less reserves held).