Monetarism is the view that the money supply is the central force shaping the economy. Changes in the money supply drive inflation, growth, and stability. Professor Steve H. Hanke has spent decades applying monetarist principles to real-world policy, developing tools such as the Golden Growth Rate to guide sound monetary management.
Stability Is Not an Accident
Money matters. When money grows too fast, inflation follows. In the worst cases, it leads to hyperinflation.
Monetarism explains why. Hanke's Golden Growth Rate explains what to do about it.
What Is Monetarism?
Monetarism holds that the money supply is the primary determinant of nominal income and the price level. By extension, economic expansion, stability, and inflation can be influenced through monetary policy, that is, through deliberate changes in the money supply. The intellectual tradition traces back to Milton Friedman and the Chicago school of economics.
Learn more about the History of Monetarism
The Key Equation: Quantity Theory of Money
The Quantity Theory of Money links the money supply to the economy's overall price level through the velocity of money:
Variable | Meaning |
M | Money Supply |
V | Velocity of Money |
P | Price Level |
Y | Real GDP |
Learn more about the Quantity Theory of Money
Hanke's Golden Growth Rate
If a country sets an inflation target, the Quantity Theory of Money implies a correct growth rate for the money supply. Hanke's Golden Growth Rate provides a clear, rule-based guide for setting that rate:
Variable | Meaning |
%dP | Inflation target |
%dY | Long-run average real GDP growth |
%dV | Long-run average change in money velocity |
Learn more about the derivation of Hanke's Golden Growth Rate
How Money Growth Translates into Inflation
Changes in the money supply do not affect the economy all at once. They work through predictable stages and lags:
- First (1-9 months): Excess money shows up in asset prices
- Next (6-18 months): Economic activity begins to accelerate
- Finally (12-24 months): Inflation appears in goods and services
This lag structure explains why rapid money growth often looks harmless at first and why inflation catches policymakers by surprise.
Hanke's Golden Growth Rate in Practice
The Golden Growth Rate is not theoretical. Professor Hanke has applied it repeatedly across countries and crises to anticipate inflation, identify policy mistakes, and evaluate monetary institutions.
Anticipating Inflation
When money growth persistently exceeds its golden benchmark, higher inflation follows with a lag. In 2021, Hanke applied this framework to the United States and showed that the explosive post-COVID surge in broad money guaranteed higher inflation well before it appeared in the CPI.
Diagnosing Policy Mistakes
Deviations below the Golden Growth Rate can be just as damaging as overshoots. During periods of financial stress, policies that drive money growth sharply below its golden path risk turning slowdowns into deeper and longer recessions.
Designing Monetary Institutions
Stable monetary systems keep money growth close to its golden rate. Hong Kong's currency board is a clear example: disciplined money growth has delivered long-run price stability despite repeated political and economic shocks.
Developing Economies
In countries with weak central banks, repeated overshoots of the Golden Growth Rate explain chronic inflation. Hanke's work on Iran shows how rule-based systems, such as currency boards, can eliminate endemic inflation where discretionary policy has failed.
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Related Topics
- Hyperinflation — What happens when money growth spirals out of control
- Currency Boards — Institutional design for monetary discipline
- Dollarization — Replacing a failed currency with a stable one
- Free Market Economics — The broader framework