What you'll learn
The basic economic problem is the starting point of the whole subject: wants are unlimited but resources are finite, so choices have to be made. This topic covers scarcity, the distinction between needs and wants, the factors of production, opportunity cost, the production possibility curve, the three questions every economy must answer, and the differences between market, planned and mixed economies. It also covers how the basic economic problem applies to consumers, firms and governments alike.
Almost every later topic depends on this one. Examiners reward candidates who apply opportunity cost precisely — as the next best alternative forgone, not merely "what it costs" — and who can read a production possibility curve rather than only define it.
Key terms and definitions
Scarcity — the condition in which resources are limited relative to unlimited wants.
The basic economic problem — how to allocate scarce resources between competing uses.
Needs — goods and services essential for survival, such as food, water and shelter.
Wants — goods and services people desire but do not need to survive.
Factors of production — the resources used to produce goods and services: land, labour, capital and enterprise.
Opportunity cost — the benefit of the next best alternative forgone when a choice is made.
Production possibility curve — a diagram showing the maximum combinations of two goods an economy can produce with its current resources.
Economic good — a good that is scarce and so has an opportunity cost.
Free good — a good with no opportunity cost of production, such as air.
Market economy — one in which resources are allocated by the price mechanism.
Planned economy — one in which the state allocates resources.
Mixed economy — one combining private and public sector allocation.
Core concepts
Scarcity and the economic problem
Human wants are effectively unlimited: satisfy one and another appears. The resources available to satisfy them — land, labour, capital and enterprise — are finite. That gap between unlimited wants and finite resources is scarcity, and it is the reason economics exists as a subject.
Because resources are scarce, every society must make choices about how to use them. Choosing one use means giving up another, so every choice carries a cost. Scarcity applies at every level: a consumer with a fixed income, a firm with a fixed budget, a government with fixed tax revenue.
Note the difference between an economic good and a free good. An economic good is scarce, so producing or consuming it involves an opportunity cost. A free good, such as air, is not scarce at the point of use and has no opportunity cost. Very few goods are genuinely free, and describing something as free simply because the consumer pays nothing — a state school place, say — is a common error: someone bears the cost.
Needs and wants
Needs are what a person must have to survive: food, clean water, shelter, clothing. Wants are everything beyond that. The distinction matters because economies must satisfy needs before wants, and because in many countries large numbers of people still have unmet needs while others consume luxuries. The line moves over time and between societies — a mobile telephone would once have been a clear want and is now close to a necessity for work in many places.
The factors of production
| Factor | Meaning | Reward |
|---|---|---|
| Land | natural resources: soil, minerals, water, forests | rent |
| Labour | human effort, physical and mental | wages |
| Capital | man-made aids to production: machines, factories, tools | interest |
| Enterprise | organising the other factors and bearing risk | profit |
Two points are regularly tested. First, capital in economics means productive equipment, not money — money is used to buy capital but is not itself capital. Second, enterprise is distinguished by bearing risk: the entrepreneur may make a loss, whereas wages are paid regardless.
The quantity and quality of a country's factors of production determine how much it can produce. Investing in education raises the quality of labour; investing in machinery raises the quantity of capital. Both shift what the economy is capable of producing.
Opportunity cost
Opportunity cost is the benefit of the next best alternative forgone. It is not the total of everything given up, and it is not the money price — it is the single best option not taken.
- A consumer who spends $50 on a jacket rather than on textbooks has an opportunity cost of the textbooks.
- A firm that uses a site for a warehouse rather than a shop has an opportunity cost of the shop.
- A government that spends on a new hospital rather than a road has an opportunity cost of the road.
Opportunity cost explains why "free" provision is not costless. A government offering free healthcare has forgone whatever else that revenue could have funded.
The production possibility curve
A production possibility curve shows the maximum combinations of two goods an economy can produce when all its resources are fully and efficiently used. Read it as follows:
- A point on the curve means resources are fully employed and production is efficient.
- A point inside the curve means resources are unemployed or used inefficiently, so more of both goods could be produced.
- A point outside the curve is unattainable with current resources and technology.
- Moving along the curve means producing more of one good and less of the other — the slope shows the opportunity cost.
- A shift outward of the whole curve means economic growth: more or better resources, or improved technology.
The curve is usually drawn bowed outwards because resources are not equally suited to both uses, so the opportunity cost rises as more of one good is produced.
Specialisation and the division of labour
One response to scarcity is to use resources more productively, and the main way economies do this is through specialisation: concentrating on what each worker, firm or country does relatively well. Within a workplace this becomes the division of labour, where production is broken into separate tasks each performed by a different worker.
The advantages are that workers become quicker and more skilled at a narrow task, time is not lost switching between jobs, training is cheaper because each worker learns less, and the use of specialised machinery becomes worthwhile. Output per worker rises, so the same resources yield more — which eases the basic economic problem without removing it.
The drawbacks matter too. Repetitive work is boring, so motivation and quality may fall and workers may leave. Production becomes interdependent: if one stage stops, the whole line stops. Workers with a single narrow skill are vulnerable if demand for that product falls. And consumers may face less variety where firms standardise output.
Specialisation also requires exchange. A worker who makes only one component cannot consume it, so specialisation only works where there is a means of trading output — which is why money and markets develop alongside it.
The three questions every economy must answer
Because resources are scarce, every economy must decide:
- What to produce — which goods and services, and in what quantities.
- How to produce — which combination of factors of production to use, for instance labour-intensive or capital-intensive methods.
- For whom to produce — how output is distributed among the population.
Different economic systems answer these questions in different ways, and that is precisely what distinguishes them.
Market, planned and mixed economies
In a market economy the questions are answered by the price mechanism. Consumers signal what they want by what they buy, prices rise where demand is high, and producers respond by supplying more because profit is available. Resources are privately owned, and the profit motive drives efficiency. The drawbacks are that goods are produced for those who can pay rather than those in need, that income inequality tends to widen, and that some goods society values — street lighting, defence — would be under-provided.
In a planned economy the state owns resources and decides what is produced, how and for whom. It can direct resources towards needs and reduce inequality and unemployment. The drawbacks are the absence of the profit incentive, the difficulty of gathering enough information to plan an entire economy accurately, and the tendency towards shortages, surpluses and limited consumer choice.
Most real economies are mixed: a private sector allocates most resources through markets while the government provides goods the market under-supplies, redistributes income through taxation and benefits, and regulates where markets produce harmful outcomes. The mix differs between countries and shifts over time through privatisation or nationalisation.
Worked examples
Example 1: Opportunity cost (4 marks). A student has $40 and is choosing between a textbook, a pair of shoes and a concert ticket. She ranks them in that order of preference and buys the textbook. State her opportunity cost and explain your answer.
Her opportunity cost is the pair of shoes. Opportunity cost is the next best alternative forgone, and the shoes were her second choice. The concert ticket is not part of the opportunity cost because it was ranked third and would not have been chosen even if she had not bought the textbook.
Example 2: Reading a production possibility curve (5 marks). An economy produces capital goods and consumer goods. It is currently operating at a point inside its production possibility curve. Explain what this shows and how the economy could move onto the curve.
A point inside the curve shows that resources are not fully or efficiently employed — there is unemployment of labour or idle capital, so output is below what is possible. The economy could move onto the curve by employing those unused resources, for example by reducing unemployment or bringing idle factories back into use. This would allow more of both goods to be produced, so there is no opportunity cost in making that move — which is why moving from inside to the curve differs fundamentally from moving along it.
Example 3: Factors of production (3 marks). A bakery owner uses her savings to buy an oven, hires two staff and rents premises. Identify the factor of production represented by each of the oven, the staff and the premises.
The oven is capital, because it is a man-made aid to production. The staff represent labour, the human effort used in production. The premises represent land, a natural resource. The owner herself supplies enterprise by organising these factors and bearing the risk of loss.
Example 4: Comparing systems (6 marks). Discuss one advantage and one disadvantage of allocating healthcare through a market rather than by the state.
An advantage is that competition between private providers creates an incentive to control costs and improve quality, because patients can take their custom elsewhere, and the profit motive encourages investment in new treatments. A disadvantage is that healthcare would be allocated according to ability to pay rather than need, so people on low incomes might go untreated even where their need is greatest. This is why most countries adopt a mixed approach, with state provision ensuring access and a private sector operating alongside it.
Common mistakes and how to avoid them
Defining opportunity cost as "what something costs". It is the next best alternative forgone. The money price is not the opportunity cost.
Listing everything given up. Opportunity cost is the single best alternative, not the sum of all rejected options.
Calling money a factor of production. Capital means productive equipment. Money buys capital but is not itself a factor.
Confusing a point inside the curve with a point outside it. Inside means resources are underused; outside means unattainable.
Saying a shift along the curve is economic growth. Growth is an outward shift of the whole curve. Moving along it merely changes the mix of output.
Treating free goods and goods free to the consumer as the same. A free good has no opportunity cost of production. A service provided free of charge still has one, borne by the taxpayer.
Describing a real economy as purely market or purely planned. Almost all are mixed; say so and describe where the balance lies.
Exam technique for The Basic Economic Problem
Use the precise definition of opportunity cost every time, then apply it to the case in the question. Definition plus application is normally two marks; definition alone is one.
When a production possibility curve is involved, say where on the diagram the economy is and why that matters. Marks attach to interpretation — inside, on, outside, along, shifted — rather than to describing the axes.
For questions on economic systems, answer with reference to the three questions: what, how and for whom. It gives a ready-made structure and ensures you cover allocation rather than drifting into unrelated advantages.
Watch the command word. Define wants one sentence. Explain wants a mechanism. Discuss or evaluate wants both sides and a judgement, and a one-sided answer cannot reach the top band however well written.
Where a question gives numbers or a ranking, use them explicitly in your answer rather than answering in general terms — examiners look for the application.
Quick revision summary
- Scarcity: unlimited wants, finite resources. This is the basic economic problem.
- Needs are essential for survival; wants are everything else.
- Factors of production: land (rent), labour (wages), capital (interest), enterprise (profit).
- Capital means productive equipment, not money. Enterprise is distinguished by bearing risk.
- Opportunity cost = the next best alternative forgone — one option, not all of them, and not the money price.
- A free good has no opportunity cost; a good free to the consumer usually still has one.
- On the production possibility curve = efficient; inside = resources underused; outside = unattainable; along = changing the mix; outward shift = economic growth.
- Every economy must answer what, how and for whom to produce.
- Market economies allocate by the price mechanism: efficient but unequal and under-provide some goods.
- Planned economies allocate by the state: can meet needs and reduce inequality but lack incentives and information.
- Most economies are mixed, and the balance shifts through privatisation or nationalisation.