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Monetarism

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Monetarism is a school of thought in monetary economics. It focuses on how policy-makers control the amount of money in circulation. This theory suggests that changes in the money supply greatly influence national output. In the short run, money affects how much a country produces. Over longer periods, money affects price levels. Monetarists believe that the best way to manage an economy is by targeting the growth rate of the money supply. They prefer these fixed rules over discretionary policy, which is when leaders make sudden, unplanned decisions.

CPI 1914-2022
CPI 1914-2022

The core mechanism of monetarism relies on the relationship between money and demand. When the money supply expands, people find themselves with more money than they originally needed. These excess money balances are then spent. This increase in spending raises the aggregate demand for goods and services. Conversely, if the money supply is reduced, people try to replenish their holdings. They do this by reducing their spending. This process can lead to changes in inflation and economic activity. Monetarists argue that excessive expansion of the money supply is inherently inflationary. Therefore, authorities should focus solely on maintaining price stability.

One specific part of this theory is the k-percent rule. This was a fixed monetary rule proposed by Milton Friedman. He suggested that the money supply should increase by a fixed percentage every year. This rate should match the growth rate of real Gross Domestic Product, or GDP. For example, if an economy is expected to grow by 2 percent, the central bank should increase the money supply by 2 percent. This rule aims to keep the price level unchanged. Friedman believed that following a strict rule would be better than discretionary policy. He argued that unplanned changes could destabilize the economy.

Monetarism has deep roots in the quantity theory of money. This is a centuries-old economic theory. Earlier economists like Irving Fisher and Alfred Marshall studied these ideas. In 1956, Milton Friedman restated the theory for a modern era. He and Anna Schwartz coauthored a famous book titled "A Monetary History of the United States, 1867–1960." They used historical data to argue that inflation is "always and everywhere a monetary phenomenon." They also looked at the Great Depression of the 1930s. They argued it was caused by a massive contraction of the money supply. They called this period "the Great Contraction."

Money supply during the great depression era
Money supply during the great depression era

The theory gained massive popularity during the 1970s. At that time, many economists could not explain rising unemployment and inflation at once. This happened during the Nixon shock in 1971 and the oil shocks of 1973. In 1979, United States President Jimmy Carter appointed Paul Volcker as Federal Reserve Chief. Volcker used monetarist ideas to fight inflation. He restricted the money supply, which led to a major rise in interest rates. This period is often called the "Volcker shock." In the United Kingdom, Margaret Thatcher also implemented monetarism. She used it as a weapon against high inflation. In the UK, inflation was 10.3% when she was elected. By 1983, she had reduced it to 4.6%. However, unemployment in the UK rose from 5.7% in 1979 to 12.2% in 1983.

CPI 1914-2022
CPI 1914-2022

Despite its rise, the use of strict monetarism declined in the 1980s and 1990s. The effectiveness of money growth targeting depends on a stable relationship between money and inflation. This requires the velocity of money to be predictable. In the 1970s, velocity seemed constant. However, in the 1980s and 1990s, velocity became highly unstable. It experienced unpredictable increases and declines. Because of this instability, the correlation between money supply and nominal GDP broke down. Most major central banks abandoned money growth targeting during this time. Instead, they turned to direct inflation targeting. They began using short-run interest rates as their main tool.

Money supply during the great depression era
Money supply during the great depression era

Today, monetarism is part of a broader framework called the neoclassical synthesis. This synthesis emerged in macroeconomics around the year 2000. While central banks no longer target money growth directly, they still value monetarist insights. Most economists agree that controlling inflation is a primary responsibility of the central bank. They also recognize that monetary policy affects economic output in the short run. The study of how money moves remains a vital part of understanding the global economy.

CPI 1914-2022
CPI 1914-2022
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