Microeconomics & Macroeconomics
The Big Idea: Economics splits into two scales: microeconomics zooms in on individual markets and personal choices, while macroeconomics zooms out to study the whole economy and big-picture government policies.
What You Need to Know
Microeconomics Focuses On:
Individual markets (like milk), prices of specific goods, individual demand and supply, and what consumers and firms choose to buy or sell.
Macroeconomics Focuses On:
The entire economy (like Singapore), average price levels (inflation), total demand and supply, and government policies that affect everyone.
The Same Players, Different Scales:
Consumers, firms, and governments make decisions at BOTH levels — but at the micro level they're thinking about individual choices, and at the macro level they're thinking about economy-wide effects.
📍Microeconomics — Zooming In
Microeconomics is the study of individual markets and sections of the economy. It looks at the choices made by individuals, households, and firms — and how those choices affect prices, demand, and supply in specific markets.
What Microeconomics Examines
Think of microeconomics like examining a single chess game. You're focused on what each individual player (consumer, firm, government) is deciding to do in that specific market.
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The choices individuals and households make — Which goods do they want to buy? How much money will they save vs. spend? How do they respond when prices change?
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The choices firms make — What products should they produce? How can they produce them efficiently? Should they change output when market conditions change?
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How government intervenes in specific markets — For example, taxing cigarettes heavily to discourage smoking, or setting safety standards for toys.
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Why prices and wages differ across markets — Why does a surgeon earn more than a cashier? Why is London property more expensive than property in the countryside?
Decision-Makers in Microeconomics
| Decision Maker |
Their Micro-Level Choices |
| Consumers |
Which goods/services do I value most? Should I buy more if the price drops? How much should I save vs. spend today? |
| Firms |
What should I produce? How can I make it as cheaply as possible while staying profitable? What do I do if a competitor enters my market? |
| Government |
Which market failures need fixing? Which industries are so important they need my support? |
💡 Real-World Example: The price of coffee in your local café is microeconomics. Your decision to buy it (or walk to a cheaper shop) is microeconomics. A government tax on sugary drinks to reduce obesity is microeconomics.
Practice Question 1
A farmer decides to grow more wheat because wheat prices have risen. Is this a micro or macro decision? Why?
🌍Macroeconomics — Zooming Out
Macroeconomics is the study of economic behaviour and decision-making across the entire economy. It looks at big-picture issues like growth, inflation, unemployment, and how government policies affect everyone.
What Macroeconomics Examines
What to Memorise