1.1.1 The economic problem
- Syllabus
- 2026
- Topic
- 1.1.1
- Level
- —
Learning objectives
1.1.1a Scarcity, finite resources and choiceThe problem of scarcity – where there are unlimited wants and finite resources, leading to the need to make choices.1.1.1b Opportunity cost and its effect on economic agentsOpportunity cost and its effect on economic agents (consumers, producers and government).1.1.1c Production possibility curve diagramsThe use of diagrams to show production possibility curve.1.1.1d Interpreting production possibility curvesProduction possibility curve diagram should be used to show:• the maximum productive potential of an economy• fully employed or unemployed resources• opportunity cost• positive or negative economic growth that shifts the production possibility frontier (PPF) outwards and inwards• possible and unobtainable production.1.1.1e Causes of positive and negative economic growthPossible causes of positive or negative economic growth.
Scarcity makes choice unavoidable
Scarcity is the basic economic problem: human wants are unlimited, but the resources available to satisfy them are finite. Resources therefore cannot produce every desired good and service, so choices must be made.
| Part of the problem | Economic meaning |
|---|---|
| unlimited wants | when one want is satisfied, people can still desire other goods, services or improvements |
| finite resources | land, labour, capital and enterprise are available in limited quantities at a particular time |
| competing uses | the same worker, machine, budget or site can often be used for different purposes |
| choice | consumers, firms and governments must decide which wants to satisfy and which to leave unmet |
A government budget cannot fund every hospital, school, road and environmental project requested. Even a wealthy economy faces scarcity because resources and time remain limited relative to all possible wants.
Scarcity does not mean a resource is completely absent, and it is not the same as a temporary shortage. A resource is scarce when its available quantity is insufficient to satisfy every competing want at a zero price.
Identify the next best alternative given up
Opportunity cost is the next best alternative given up when a choice is made. It is the value of the best rejected option, not every possible alternative and not necessarily the money paid.
| Economic agent | Choice | Possible opportunity cost |
|---|---|---|
| consumer | buy a television with limited savings | the next-best phone or holiday that can no longer be bought |
| producer | purchase a delivery vehicle | the next-best machine, marketing campaign or staff training forgone |
| government | fund a new hospital | the next-best school, road or other public service that the same resources could have provided |
The effect depends on what is forgone: a consumer loses satisfaction, a producer may lose future revenue or productivity, and a government gives up benefits to another group or policy objective. Context identifies which alternative is genuinely next best.
The purchase price is an accounting cost; opportunity cost is the best alternative use of those resources. If no alternative is named and linked to the decision, the opportunity cost has not been identified.
Construct a production possibility curve
A production possibility curve or frontier (PPC/PPF) shows the maximum combinations of two goods or categories an economy or firm can produce with its current resources and technology when those resources are fully employed.
| Diagram feature | What it represents |
|---|---|
| horizontal axis | quantity of one product, such as tables |
| vertical axis | quantity of the other product, such as chairs |
| intercepts | maximum output of one product when none of the other is produced |
| downward-sloping frontier | producing more of one product requires giving up some of the other |
| movement along the frontier | a reallocation of existing resources, not a change in productive capacity |
To show a firm producing more tables and fewer chairs, mark a second point farther right and lower on the same frontier. Guide lines can make both output changes visible, and both axes must be labelled.
A movement along one PPC changes the output mix. A shift of the whole PPC changes productive potential; do not draw a new frontier merely because production moves from one attainable combination to another.
Read productive capacity, efficiency and cost from a PPC
A PPC separates combinations that current resources can produce from those they cannot, while its position and movements reveal resource use, opportunity cost and changes in maximum productive potential.
| Position or change | Interpretation |
|---|---|
| point on the frontier | maximum productive potential with resources fully employed and used efficiently |
| point inside the frontier | possible output with unemployed or inefficiently used resources |
| point outside the frontier | currently unobtainable with existing resources and technology |
| movement along the frontier | opportunity cost: gaining one output requires sacrificing some of the other |
| outward shift | positive economic growth; more of one or both categories can potentially be produced |
| inward shift | negative economic growth; productive potential has fallen |
If moving from B to A raises consumer goods from 130 million to 160 million units while capital goods fall from 450 million to 350 million, the opportunity cost of the extra 30 million consumer goods is 100 million capital goods.
An inside point does not prove the economy lacks resources; it shows current resources are not fully or efficiently employed. Economic growth shifts potential output, but actual production can remain inside the new frontier.
Explain why productive potential grows or contracts
Positive economic growth is an increase in an economy's maximum productive potential, shown by an outward PPC shift. Negative growth reduces that potential and shifts the PPC inward.
| Change in productive capacity | Causal route | PPC effect |
|---|---|---|
| more or better capital | investment adds machinery, infrastructure or productive buildings | outward |
| larger or more skilled labour force | population growth, migration, education or training raises available effective labour | outward |
| technological advance or greater efficiency | each unit of resource can produce more output | outward |
| discovery or improved access to natural resources | more usable inputs become available | outward |
| destruction or loss of resources | war, natural disaster, capital deterioration, emigration or resource depletion removes productive inputs | inward |
| lower productivity | loss of skills, technology or institutional effectiveness reduces output from existing inputs | inward |
A change that benefits both categories can shift the whole curve. A sector-specific resource or technology improvement may expand productive potential more strongly toward one axis, so the shift need not be perfectly parallel.
Producing more by moving from inside the PPC toward it uses spare capacity but does not itself prove the frontier has shifted. A PPC shift requires a change in the quantity or productivity of resources or technology.