💵 Monetarism

Monetarism - 米尔顿·弗里德曼(Milton Friedman, 1956-1976)

📖 Standard Introduction

Monetarism is an important school of macroeconomics that emphasizes the central role of money supply in determining nominal GDP and price levels. Friedman's core proposition is that "inflation is always and everywhere a monetary phenomenon", arguing that sustained inflation is inevitably accompanied by continuous growth in the money supply. Monetarism advocates a fixed money growth rule, opposing Keynesian discretionary policies. Based on the quantity equation MV=PY, the theory holds that when velocity V is relatively stable, changes in money supply M primarily affect price level P, with limited long-term impact on real output Y.

💬 Plain Language Explanation

Monetarism in one sentence: Inflation happens because too much money is printed. Imagine a small island with 100 loaves of bread and $100, so each loaf costs $1. If $100 more is suddenly printed, making $200 total but still only 100 loaves, the price will rise to $2 per loaf — that's inflation. Friedman argued that governments shouldn't keep trying to stimulate the economy by printing money; it might work short-term, but long-term it only causes price increases. Like watering plants — a little helps them grow, too much drowns them. So monetarism advocates: central banks should increase money supply steadily and predictably, avoiding wild fluctuations, so the economy can develop healthily.

💡 Core Concepts

Core Equation: MV = PY (Quantity Theory of Money)

Key Proposition: "Inflation is always and everywhere a monetary phenomenon"

Historical Development:

  • 1956: Friedman's "Studies in the Quantity Theory of Money"
  • 1963: "A Monetary History of the United States" demonstrated Great Depression caused by monetary contraction
  • 1970s: Monetarism influences Federal Reserve policy
  • 1976: Friedman awarded Nobel Prize in Economics
  • 1979-1982: Volcker adopts monetarist approach to fight inflation

Practical Cases:

  • 1970s Stagflation: Monetarism explained Keynesian failure
  • Volcker's Anti-Inflation: Strict money supply control successfully reduced inflation
  • 2008 QE: Massive monetary expansion without high inflation challenged monetarism