Scarcity is the basic economic problem
Human wants are infinite but resources are finite, so not all wants can be satisfied — this mismatch is scarcity, the basic economic problem. Scarcity forces every agent (consumers, firms, governments) to choose between competing uses of resources. Choosing one use means giving up another, which leads straight to opportunity cost. Even a rich economy faces it: extra resources satisfy more wants, but never all of them.
Four factors of production and rewards
Resources are grouped into four factors of production. Land = natural resources (soil, minerals, sea), earning rent. Labour = physical and mental human effort, earning wages. Capital = man-made goods that make other goods (machines, tools, factories), earning interest — physical goods, not money. Enterprise = organising the other factors and bearing risk, earning profit. Money only buys factors — it is not one.
Opportunity cost = next-best forgone
Because resources are scarce, using them one way sacrifices another use. Opportunity cost is the next-best alternative forgone when a choice is made. A government spending a fixed budget on healthcare forgoes the schools it could have built instead. The idea applies to consumers, firms and governments alike. A precise 0455 definition needs only the meaning — the next-best alternative given up — and requires no example.
Drawn from real examiner reports.
Define needs the meaning, not an example
A 2-mark define (AO1 only) is marked on the precise meaning of the term. Offering only an example (such as naming a scarce good), or loose wording, loses marks. Opportunity cost means the next-best alternative forgone when a choice is made; an example of a choice is not required and cannot earn the mark by itself.
November 2022 Paper 2 (0455/22) Q2a noted that opportunity cost was well defined but some candidates added an example that was not required; the June 2023 Paper 2 (0455/21) Q2a similarly penalised imprecise wording where candidates described rather than defined the term.
"The economic problem" isn't inflation
"The economic problem" means the basic problem — limited resources, unlimited wants and the scarcity that forces choices. A recurring slip is to read "problem" loosely and answer about a current issue such as inflation or unemployment. These are problems in everyday language, not "the economic problem" of the syllabus. Anchor the answer to scarcity and choice.
November 2022 Paper 2 (0455/22) Q2b: a small proportion of candidates wrote about an economic problem such as inflation rather than the nature of the basic economic problem; the examiner advised careful reading of the stem.
Productivity ≠ production
Production is total output. Productivity is output per unit of input over time — usually output per worker (labour productivity). Candidates often write "productivity" when they mean total "production", which weakens the analysis. Adding more resources raises production; using existing resources more effectively raises productivity.
Flagged as a key message in the June 2023 Paper 2 (0455/22) report and again in the November 2022 Paper 2 (0455/22) general comments: "productivity does not have the same meaning as production" yet candidates continue to confuse the two.
Capital is not money
As a factor of production, capital means physical man-made goods used to produce others — machines, tools, factories. It does not mean money. Money only buys factors and produces nothing itself, so calling money a factor of production loses credit. Reserve the word "capital" for the physical productive goods.
Opportunity cost vs money cost
Money cost is the price paid for something. Opportunity cost is the next-best alternative given up to have it — a real sacrifice, not a sum of money. A decision to spend time revising has an opportunity cost even when no money changes hands. In answers, identify what was actually forgone, not just what was spent.
Scarcity needs BOTH limits
A full definition of scarcity links both limits: unlimited (infinite) wants set against limited (finite) resources. Naming only one — "not enough resources" or "people want a lot" — is incomplete and caps the mark. State the two together and the consequence: not all wants can be met, so choices must be made.
8-mark discuss: two sides + judgement
The 8-mark (d) part carries the only AO3 (evaluation) marks. Level 3 needs a two-sided discussion, each point developed into a chain of reasoning, then a supported judgement that weighs the sides. Plan the time — weak answers run short on (d).
Match the command word
Let the command word set the depth: define (2) = precise meaning; explain (4) = meaning plus a developed reason; analyse (6) = a full chain of reasoning; discuss (8) = both sides plus a judgement. Answering below the command's demand caps the level.
Develop points, don't just list
Development is the biggest mark separator. Turn each point into a chain: point -> because -> therefore. "A hospital helps patients" scores little; "a new hospital treats more patients, so the workforce is healthier, so output rises" earns the analysis marks.
Every economy faces the same starting point: wants are unlimited but resources are limited.
This mismatch creates scarcity: not all wants can be satisfied. Scarcity is the basic economic problem, and it forces every consumer, firm and government to make choices about how to use resources.
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