Edexcel IGCSE Economics (4EC1) · Section A: The Market System
Specification points
- The economic problem: scarcity, choice and opportunity cost.
- The factors of production and their rewards.
- Production possibility frontiers (PPFs).
The economic problem
Wants are unlimited but resources are scarce, so everyone must choose how to use them. Every choice has an opportunity cost — the next best alternative given up.
Scarcity → choice → opportunity cost.
The factors of production
| Factor | Meaning | Reward |
|---|---|---|
| Land | Natural resources | Rent |
| Labour | Human effort | Wages |
| Capital | Human-made aids to production | Interest |
| Enterprise | Organising factors and taking risk | Profit |
Key definitions
| Term | Definition |
|---|---|
| Scarcity | Limited resources cannot satisfy unlimited wants. |
| Opportunity cost | The next best alternative given up when a choice is made. |
| PPF | A curve showing the maximum output combinations of two goods using all resources efficiently. |
Production possibility frontiers
A PPF shows the maximum combinations of two goods an economy can produce with full, efficient use of resources. Points on the curve are efficient; inside show unemployed resources; outside are unattainable. Moving along shows opportunity cost, and an outward shift shows economic growth.
Worked example
A government spends a fixed budget on either hospitals or schools. Choosing hospitals means the opportunity cost is the schools forgone. On a PPF for "hospitals vs schools", producing more hospitals means moving along the curve and giving up some schools — the economic problem in action.
Common exam mistakes
- Saying resources are unlimited — it is *wants* that are unlimited.
- Calling opportunity cost the money spent rather than the alternative given up.
- Treating a point inside the PPF as impossible rather than inefficient.
Exam technique
Define terms precisely and use the PPF to illustrate opportunity cost and growth.
Quick revision
- Economic problem: scarcity forces choice.
- Factors: land, labour, capital, enterprise (rent, wages, interest, profit).
- PPF: on = efficient, inside = spare capacity, outside = unattainable.