Scarcity, opportunity cost, factors of production and enterprise

Last time

Before we start: last time, in Economic systems and types of goods, you learned these points. Here they are again on one card. Keep them in mind, because today builds on them.

The economic problem at AS Level

At AS Level the basic ideas are the same as at O Level, but you must use them precisely and evaluate. Scarcity forces choice, and every choice has an opportunity cost. This lesson revisits scarcity and opportunity cost, then looks closely at the factors of production and the role of the entrepreneur.

Scarcity

Scarcity exists because human wants are unlimited, while the resources to satisfy them are finite. So every economy must decide what to produce, how to produce it, and for whom. Scarcity is relative: even rich economies face it, because wants grow as incomes grow.

Opportunity cost

Opportunity cost is the value of the next best alternative forgone. It applies to consumers, firms and governments: spending on defence may mean less on health. Not every choice has an equal opportunity cost: it depends on how much the next best alternative is valued, and whether resources were unemployed.

Opportunity cost and unemployed resources

If an economy has unemployed resources, it can produce more of one good without giving up another: the opportunity cost is close to zero. At full employment, more of one good always means less of another. And free goods, such as air, have no opportunity cost at all.

Factors and rewards

The four factors of production, their rewards, and their key features.

Quantity and quality of factors

The quantity of labour depends on population, migration and participation; its quality on education, training and health. Capital grows through investment, which requires saving: consumption given up today. Land can be improved, by irrigation or fertilisers, or degraded, by erosion. More or better factors shift the PPC outwards.

The entrepreneur

The entrepreneur organises the other factors, makes decisions, and bears the risk of loss. Entrepreneurs innovate: new products, new methods and new markets. Profit is the reward for taking risk, and the signal that resources are being used where consumers want them.

Enterprise and growth

Enterprise creates firms, jobs and competition, and drives innovation and productivity. Governments encourage it with lower taxes on profit, easier regulation, start-up loans and training. Evaluation: other factors matter too. Without skilled labour and capital, enterprise alone may not raise long-run growth.

The AS essay structure

Part a, eight marks: explain the theory clearly, with a diagram where relevant, then consider a limitation. Part b, twelve marks: analyse both sides, then evaluate: reach a supported judgement, saying what it depends on. Evaluation words: it depends on, in the short run, in the long run, the most significant factor is.

Mistakes that lose marks

Mistake one: defining opportunity cost as all the alternatives given up. Mistake two: forgetting that unemployed resources lower the opportunity cost. Mistake three: a part b answer with no judgement. The fix: precise definitions, and evaluation that says what it depends on.

The full-marks tip

The full-marks tip: define every term precisely, using the words of the syllabus. In part b, end with a judgement that says what the answer depends on.

On one card

So, on one card: the basic economic problem. Keep it for revision.