Why must every society make choices about how to use its resources?
The economic problem of scarcity, the difference between needs and wants, opportunity cost, and why choices have to be made by consumers, producers and government.
A focused answer for AQA GCSE Economics on the economic problem of scarcity, needs versus wants, the three economic agents, opportunity cost and how choices are made.
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What this dot point is asking
AQA wants you to explain why scarcity forces everyone to make choices, to distinguish needs from wants, and to use opportunity cost to analyse the decisions made by consumers, producers and government. This is the foundation concept of the whole course and reappears in almost every topic.
The economic problem
Economics starts from a simple fact: the world has limited resources (limited land, labour, capital and enterprise) but people have unlimited wants. Because we cannot have everything, we must choose. This is the basic economic problem of scarcity.
Scarcity is not the same as a temporary shortage. A shortage is a short-term gap that price can clear; scarcity is the permanent fact that resources are finite relative to wants, which is why it never goes away.
Needs and wants
- A need is something essential for survival, such as food, water, shelter and clothing.
- A want is something that is not essential but improves a person's quality of life, such as holidays, games consoles or designer trainers.
Wants are effectively unlimited, which is why scarcity exists no matter how rich a society becomes. As one want is satisfied, new wants appear, so there is never enough to meet them all.
Opportunity cost
Opportunity cost applies to all three economic agents:
- Consumers choose how to spend limited income. Buying a phone may mean giving up a holiday.
- Producers choose how to use limited resources. Making more cars may mean making fewer vans.
- Government chooses how to spend limited tax revenue. More spending on defence may mean less on the NHS.
The three economic agents
The economy is driven by three groups of decision makers: consumers (households who buy goods and services to maximise satisfaction), producers (firms that make goods and services to earn profit), and the government (which raises taxes, spends on public services and sets the rules). Each one faces scarcity and must make choices, and each choice carries an opportunity cost.
Worked example
Try this
Q1. Define opportunity cost. [2 marks]
- Cue. The next best alternative given up when a choice is made.
Q2. Explain one reason why a consumer faces the economic problem. [3 marks]
- Cue. Income is limited but wants are unlimited, so the consumer must choose and give up alternatives.
Exam-style practice questions
Practice questions written in the style of AQA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AQA 20186 marksExplain, using the concept of opportunity cost, why a government must make choices when spending its budget.Show worked answer →
Government revenue is finite but the demand for public services is effectively unlimited, so the government cannot fund everything it would like. This is the economic problem of scarcity applied to the public sector.
Because resources are limited, spending money on one thing means it cannot be spent on another. The opportunity cost of a choice is the next best alternative given up. For example, money spent building a new motorway is money that cannot be spent on hospitals.
A 6 mark answer names a real trade-off (for example schools versus defence) and states clearly that the opportunity cost is the value of the single best alternative forgone, not all the things given up.
AQA 20209 marksA consumer has a fixed weekly budget. Discuss how the idea of opportunity cost can help explain the spending choices they make.Show worked answer →
A consumer faces the economic problem because their income is limited but their wants are unlimited, so every purchase means giving something else up.
The opportunity cost of buying, say, a concert ticket is the next best thing the money could have bought, such as a new pair of trainers. A rational consumer compares the benefit of each option and chooses the one giving the greatest satisfaction per pound.
A strong answer applies the concept to a clear example, explains that opportunity cost is the single best alternative forgone, and judges that consumers may not always choose rationally (limited information, impulse buying). Markers reward application plus a supported judgement.
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Sources & how we know this
- AQA GCSE Economics (8136) specification — AQA (2017)