What Is Inflation? Definition, Causes, Types and Effects
Quick Answer
Inflation is the sustained increase in the general price level of goods and services over time, reducing the purchasing power of money. Understanding inflation is fundamental to macroeconomics and economic policy.
Defining Inflation
Inflation refers to the sustained increase in the general price level of goods and services in an economy over a period of time. When the price level rises, each unit of currency buys fewer goods and services — in other words, the purchasing power of money falls.
Inflation is measured most commonly by the Consumer Price Index (CPI), which tracks the price changes of a representative basket of goods and services bought by typical households. In the UK, the Retail Price Index (RPI) and CPIH (which includes housing costs) are also used.
Types of Inflation
| Type | Description | Rate |
|---|---|---|
| Creeping inflation | Slow, steady price increases | 1–3% annually |
| Walking inflation | Moderate inflation causing concern | 3–10% annually |
| Running inflation | Rapid price increases, harder to control | 10–20% annually |
| Hyperinflation | Extremely rapid, uncontrolled inflation | 50%+ per month |
| Deflation | Falling price levels (negative inflation) | Below 0% |
| Stagflation | High inflation + high unemployment + low growth | Variable |
Main Causes of Inflation
Economists identify three primary causes of inflation:
- Demand-pull inflation: Excess demand in the economy pulls prices up — "too much money chasing too few goods"
- Cost-push inflation: Rising production costs (wages, raw materials, energy) push prices up from the supply side
- Built-in (wage-price) inflation: A self-reinforcing cycle where workers demand higher wages to compensate for rising prices, which then increases costs and prices further
Effects of Inflation
Negative effects:
- Erodes purchasing power, especially for fixed-income earners
- Creates uncertainty that discourages investment
- Redistributes income from creditors to debtors (real value of debt falls)
- Reduces international competitiveness if domestic prices rise faster than trading partners
Positive effects (at low levels):
- Encourages spending and investment rather than hoarding cash
- Allows real wage adjustments without nominal wage cuts
- Provides governments with some flexibility in debt management
How Governments and Central Banks Control Inflation
The primary tool for controlling inflation is monetary policy — particularly interest rate changes by central banks:
- Raising interest rates: Increases borrowing costs, reduces consumer spending and business investment, cooling demand
- Reducing money supply growth
- Fiscal policy: Governments can reduce spending or raise taxes to cool aggregate demand
- Supply-side policies: Addressing cost-push factors through competition policy, reducing trade barriers
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Written by
Editorial Team
Expert writers in international business and economics education.
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