Human wants are unlimited, but the resources (inputs) available to satisfy them are limited. This mismatch is the basic (fundamental) economic problem. Economics is about economising: making the most of what we have.
| Free goods | Economic goods | |
|---|---|---|
| Scarcity | Not scarce; available in as great a quantity as desired | Scarce |
| Opportunity cost | Zero opportunity cost to society | Always have an opportunity cost |
| Price | No price | Have a price |
| Resources | Not made from scarce resources; freely available in nature | Made from scarce resources |
| Examples | Air, sunlight, sand in the Sahara | Mobile phones, jewellery, cars |
A good given away at a zero price is not automatically a free good. Free school education or free public healthcare still use scarce resources (teachers, doctors, buildings), so they have an opportunity cost and are economic goods.
Because resources are scarce, a choice has to be made about how to use them. Choosing one use means giving up another.
Analysis chain (AO2): Resources are scarce → every decision-maker must choose → choosing one option means the next best alternative is given up → the opportunity cost of the choice.
Every decision that involves a choice between two or more options has an opportunity cost. It is measured in terms of what is forgone, not necessarily in money.
Analysis chain (AO2): A resource used for good A cannot be used for good B → output of B forgone → this forgone benefit is the real cost of producing A, even if the money price is zero.
Every society must answer three basic questions because of scarcity:
| Question | What it asks | Issues |
|---|---|---|
| What to produce? | Which goods and services, and in what quantities | Consumer goods or capital goods; private or public goods |
| How to produce? | Which methods and combination of resources | Labour-intensive (small firm, skilled labour) or capital-intensive (large firm, machinery) |
| For whom to produce? | How output is shared among members of society | Equal shares? Larger shares for those who produce more, for skilled workers, or according to need? |
Analysis chain (AO2): Scarcity → resources cannot satisfy all wants → society must decide what, how and for whom → the economic system determines who makes these decisions.
| No. | Question | Marks | Model answer |
|---|---|---|---|
| 1 | Using examples from households, firms and the government, explain how scarcity and opportunity cost are connected. | 8 | ✓ below |
| 2 | Explain why scarcity means that every economic decision involves an opportunity cost, and assess whether opportunity cost is always a useful concept for governments. | 8 | ✓ below |
| 3 | Explain why scarcity exists in both high-income and low-income countries and consider whether it can ever be eliminated. | 8 | |
| 4 | With examples, explain the three basic questions every economy must answer and consider which is the hardest for a government to answer. | 8 | |
| 5 | Assess whether the opportunity cost of a government decision, such as building a new expressway, can ever be measured accurately. | 12 |
Question: Using examples from households, firms and the government, explain how scarcity and opportunity cost are connected. [8]
[AO1 Knowledge & understanding] The basic economic problem is that resources (land, labour, capital and enterprise) are limited, while human wants are unlimited. This situation is called scarcity. Scarcity does not mean that a good is rare; it means there is not enough of it to satisfy everyone's wants at a zero price. Opportunity cost is the value of the next best alternative that is given up when a choice is made.
[AO2 Analysis] Because resources are scarce, every economic agent must choose how to use them. Once a resource is used for one purpose it cannot be used for another, so every choice means giving something up. A student who spends an evening revising economics gives up the next best use of that time, such as earning money from a part-time job. A firm such as Tata Motors that uses its factory space to produce electric vehicles cannot use the same space for diesel cars. The Indian government that spends its budget on defence equipment gives up the hospitals or schools that could have been built. In each case scarcity forces a choice, and the choice creates an opportunity cost. If there were no scarcity, there would be no need to choose, and so no opportunity cost: this is why free goods such as air have a zero opportunity cost. The link can also be shown on a PPC: moving along the curve to produce more of one good requires giving up some of the other.
[AO3 Evaluation] Opportunity cost is not always easy to measure, because the value of the next best alternative is often subjective and not expressed in money. It is also not always present: when resources are unemployed, the economy is inside its PPC and extra output can be produced without giving anything up, so the link between scarcity and opportunity cost is strongest when the economy is close to full employment.
Question: Explain why scarcity means that every economic decision involves an opportunity cost, and assess whether opportunity cost is always a useful concept for governments. [8]
[AO1 Knowledge & understanding] Scarcity is the situation where resources (land, labour, capital and enterprise) are limited while human wants are unlimited. Because resources cannot satisfy every want, choices must be made. Opportunity cost is the value of the next best alternative given up when a choice is made.
[AO2 Analysis] If the Indian government uses ₹10,000 crore to build a new expressway, those same funds, engineers and steel cannot also be used to build hospitals. The hospitals that could have been built are the opportunity cost of the expressway. This applies at every level: a household that spends its savings on a two-wheeler gives up the school fees it could have paid; a firm such as Tata Steel that builds a new plant gives up the dividends it could have paid shareholders. Therefore, since resources are scarce, every decision to use them one way means they cannot be used another way, so every decision has an opportunity cost.
[AO3 Evaluation] However, opportunity cost is not always easy for governments to use. First, the value of the next best alternative is often hard to measure in money: how should the benefit of extra hospital beds be compared with time saved on a highway? Second, when resources are unemployed, for example during a recession when the economy is inside its PPC, extra output can be produced with almost no opportunity cost, so the concept matters less.
[Conclusion (AO3 judgement)] On balance, opportunity cost is most useful when the economy is close to full employment and the alternatives can be measured; it is a useful way of thinking even when an exact figure cannot be calculated.