Explain scarcity and the basic economic choices
Use scarcity to explain why consumers, workers, firms and governments choose what, how and for whom to produce.
Cambridge IGCSE Economics 0455 / IGCSE (9–1) Economics 0987, 2027–2029 Version 1. Apply each model to the stated evidence and qualify conclusions where effects depend on context. Practice is original and self-checked; it is not a Cambridge paper, mark scheme or official grade.
Before you begin
- No prior economics study is assumed. Read the scenario for the decision-maker, the market or economy involved, the time period and the evidence supplied.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which question asks who receives a good or service?
What you will learn
- Explain scarcity and the basic economic problem
- Distinguish economic goods from free goods
- Apply the three allocation questions to a decision
Finite resources meet many wants
The basic economic problem arises because resources are finite while human wants are not all satisfied. Scarcity exists relative to wants; it does not mean a resource is rare everywhere. Consumers choose how to use income and time, firms choose what to make and governments choose how to use public resources.
An economic good uses scarce resources and has an opportunity cost. A free good is available without using scarce resources at the point of consumption; its status can change if access becomes constrained or costly.
Every system answers three questions
Resource allocation determines what is produced, how it is produced and who receives the output. Prices and income influence these answers in markets; governments and communities can also affect them.
A complete explanation names the scarce resource and the decision-maker. A government clinic, for example, still uses labour, buildings and finance that could have served another purpose.
Pause and explain
Why can clean air be a free good in one setting but scarce in another?
Worked example
A town has a fixed budget and chooses a bus route over a sports hall. Identify the basic economic problem and the three questions the choice raises.
Show the worked solution
- The budget and available resources are limited relative to possible projects.
- The town chooses what service to provide and how to organise it.
- Eligibility, fares or location affect who can use the service.
Answer Scarcity makes the town choose. It must decide what to provide, how to use resources to provide it, and who can access the service; the sports hall is the forgone alternative if it was next best.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
A student has two free hours and chooses paid work instead of revision. Explain the choice using the basic economic problem.
Give me a hint
Name the limited resource and the next-best alternative.
Compare my reasoning
- Time is limited.
- Work and revision are competing uses.
- The forgone study benefit is the opportunity cost if revision was next best.
The student allocates scarce time to work. If revision was the next-best option, its expected benefit is the opportunity cost.
Look for these in your work
- Scarce resource named
- Alternatives compared
- Next-best option used
A council must decide whether to repair a bridge or expand a library. Explain how the three allocation questions apply.
Give me a hint
Consider the service, production method and intended users.
Compare my reasoning
- What: bridge repair or library access.
- How: labour, materials and procurement.
- For whom: road users or library users, including access arrangements.
The council chooses which service to fund, how to organise the work and which residents will benefit. The answer depends on its aims and evidence about need.
Look for these in your work
- What identified
- How identified
- For whom identified
A beach is free to visit but becomes overcrowded and needs conservation work. Is it still a free good in every economic sense? Explain.
Give me a hint
Separate the absence of a fee from scarcity of access and upkeep.
Compare my reasoning
- There may be no admission price.
- Congestion limits access and conservation uses resources.
- Its economic status depends on the specific scarce resource considered.
The visit may have no price, but space and conservation resources are scarce. It is misleading to call every aspect of the beach a free good once access or upkeep has a real opportunity cost.
Look for these in your work
- Price distinguished from scarcity
- Capacity or upkeep considered
- Conclusion qualified
Common mistakes
- Calling scarcity the same as poverty
- Treating every useful item as a free good
- Listing the three questions without applying them to the decision-maker
What can you explain now?
When is an item an economic good?
Compare with the explanation
When providing or using it requires scarce resources
The defining issue is scarcity and opportunity cost, not usefulness alone.
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Make it stick
When is an item an economic good?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.