Classical vs. Keynesian School
Chapter 9: Classical vs. Keynesian School
Modern macroeconomics has evolved through the debate between the Classical school, which believes in the market’s self-healing ability, and the Keynesian school, which emphasizes active government intervention.
1. Classical School
Extending the logic of Adam Smith’s ‘invisible hand’, this school believes that the market always finds its own equilibrium.
- Core Logic (Say’s Law): “Supply creates its own demand.” Production generates income, which in turn is used to buy goods, so overproduction cannot occur.
- Characteristics:
- Perfect Price Flexibility: Prices, wages, and interest rates are highly flexible, resolving imbalances immediately.
- Supply-Side Focus: Production capacity is the key to economic growth.
- Role of Government: Night-watchman state (Small Government). The government should not interfere in the market.
2. Keynesian School
A new perspective presented by John Maynard Keynes when the Great Depression of the 1930s could not be explained by Classical theory.
- Core Logic (Principle of Effective Demand): “Demand creates its own supply.” The total output of an economy is determined by ‘Effective Demand’—the desire to buy goods.
- Characteristics:
- Price Rigidity: Specifically, wages and prices are ‘sticky’ and do not fall easily. Thus, it takes too long for the market to recover on its own during a recession.
- Demand-Side Focus: The cause of recession is a lack of demand.
- Role of Government: Active government intervention (Big Government). The government should create demand by increasing spending.
3. Summary Comparison
| Category | Classical School | Keynesian School |
|---|---|---|
| Focus | Supply (Long-run analysis) | Demand (Short-run analysis) |
| Prices | Perfectly Flexible | Rigid (Sticky downwards) |
| Equilibrium | Always at Full Employment | Involuntary Unemployment possible |
| Government | Laissez-faire | Active Intervention |
4. Modern Perspective: Complementary Relationship
Modern economics tends to see Keynesian arguments as valid in the short run and Classical arguments as valid in the long run.
Lesson of the Great Depression: It showed that markets can be imperfect and that appropriate fiscal and monetary policies by the government can sometimes save an economy from crisis.
Key Checklist
- What law states “supply creates its own demand”? (Answer: Say’s Law)
- What did Keynes call the phenomenon where wages do not easily fall to low levels? (Answer: Price Rigidity / Sticky Wages)
- According to Keynes, what was the primary cause of a severe economic downturn like the Great Depression? (Answer: Lack of Effective Demand)
- Which school focuses more on long-term economic growth? (Answer: Classical School)
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