Welcome to the World of Economic Schools!
In your CB2 journey, you’ve likely noticed that economists don't always agree. In fact, they often argue! This isn't because they are bad at math, but because they belong to different Schools of Thought. Think of these schools like different "philosophies" or "playbooks" for how an economy should be managed.
Understanding these schools is vital because it helps you understand why governments make certain choices today. Don't worry if it seems like a lot of names and theories—we’re going to break it down into simple, relatable stories. Let's dive in!
1. The Classical School: The "Self-Healing" Economy
The Classical school (think Adam Smith in 1776) is the oldest. Their main belief is that the economy is like a self-healing body. If you leave it alone, it will eventually fix itself and find a balance.
Key Features:
Laissez-faire: This is a French term meaning "let it be." Classical economists believe the government should stay out of the way.
Say's Law: This is the famous idea that "Supply creates its own demand." In other words, if people produce goods, they earn income, and they will use that income to buy other goods. Therefore, there can never be a general oversupply of goods in the long run.
Flexible Prices and Wages: They believe that if there is unemployment, wages will naturally fall until everyone is hired again. If there is a surplus of goods, prices will drop until everything is sold.
Analogy: Imagine a buffet where the food never goes to waste because the price automatically drops to 1 cent right before closing time. Everyone eventually buys everything, and the market "clears."
Quick Review: Classical economists focus on the Long Run. They believe the economy always returns to Full Employment on its own.
2. The Keynesian School: The "Government to the Rescue"
During the Great Depression of the 1930s, the "self-healing" mechanism didn't seem to work. John Maynard Keynes (pronounced "Canes") stepped in with a new idea: the economy doesn't always fix itself.
Key Features:
Demand-Side Focus: Unlike the Classicals, Keynes believed that Aggregate Demand (AD) drives the economy. If people are too scared to spend, the economy will stall.
Sticky Wages and Prices: Keynes argued that wages don't just "fall" when there is unemployment. Workers resist pay cuts, and contracts exist. Therefore, the economy can get "stuck" in a recession for a long time.
Fiscal Policy: Keynes argued that when the private sector isn't spending, the Government must step in and spend money to "kickstart" the heart of the economy.
Did you know? Keynes famously said, "In the long run, we are all dead." He meant that waiting for the "long run" to fix the economy is useless if people are suffering right now.
Common Mistake to Avoid: Don't confuse "Fiscal" and "Monetary." Fiscal Policy (Keynes's favorite) involves government spending and taxes. Monetary Policy involves interest rates and the money supply.
3. Monetarism: It’s All About the Money
In the 1970s, many countries faced high inflation and high unemployment at the same time (Stagflation). Keynesian ideas struggled to explain this. Enter Milton Friedman and the Monetarists.
Key Features:
Money Supply: Monetarists believe that inflation is caused by having too much money chasing too few goods. Their motto is: "Inflation is always and everywhere a monetary phenomenon."
The Equation of Exchange: They use the formula \( MV = PY \).
Where:
\( M \) = Money Supply
\( V \) = Velocity of money (how fast it changes hands)
\( P \) = Price level
\( Y \) = Real Output
Monetarists argue that \( V \) and \( Y \) are relatively stable in the long run, so if you increase \( M \), the only result is an increase in \( P \) (Inflation).
Natural Rate of Unemployment: They believe the government cannot keep unemployment below a certain "natural" level just by printing money; doing so only creates higher inflation.
Key Takeaway: Monetarists want the government to focus on one thing: controlling the money supply to keep inflation low and stable.
4. New Classical and New Keynesian Schools
These are the modern "remixes" of the older schools. They use complex math, but the core ideas are simple.
New Classical (The "Rational" Thinkers):
They introduced Rational Expectations. This means people are smart and use all available information. If the government announces it will print money to boost the economy, people will immediately expect inflation and raise their prices. This makes the government's policy ineffective even in the short run.
New Keynesian (The "Realistic" Thinkers):
They agree with New Classicals that people are rational, but they explain why the economy still gets stuck. They point to Menu Costs (the literal cost of changing price tags) and Efficiency Wages (paying workers more to keep them productive) as reasons why prices and wages remain "sticky."
Memory Aid:
New Classical = Everyone is super-smart and markets work perfectly.
New Keynesian = Everyone is smart, but "friction" (like contracts) makes markets messy.
5. Supply-Side Economics: Boosting Production
While Keynesians look at how much people spend (Demand), Supply-siders look at how much firms produce (Supply).
Key Features:
Incentives: They believe high taxes discourage people from working and firms from investing.
The Laffer Curve: This theory suggests that if tax rates are too high, cutting them might actually increase total tax revenue because people will work so much harder.
Deregulation: Reducing "red tape" and government rules to make it easier for businesses to grow.
Analogy: If you told a student they had to give 90% of their marks to the school, they might stop studying. If you lower that "tax" on their marks, they study harder!
6. Summary Table for Quick Revision
Classical: Focus = Long Run. Fix = Let it be. Cause of trouble = Gov intervention.
Keynesian: Focus = Short Run. Fix = Gov spending. Cause of trouble = Lack of demand.
Monetarist: Focus = Inflation. Fix = Control money supply. Cause of trouble = Too much money.
Supply-Side: Focus = Production. Fix = Cut taxes/rules. Cause of trouble = High taxes/regulations.
Final Encouragement
Don't worry if these schools seem to overlap or contradict each other—that's exactly what happens in the real world! For your CB2 exam, focus on who likes government intervention (Keynesians) and who prefers the market to handle things (Classicals/Monetarists). You've got this!