01Model
Build the economic model
Households supply factors and receive income; firms produce output and receive expenditure. Withdrawals reduce circular spending while injections add spending from outside the core flow.
For circular flow of income, state the relationship between injection and the relevant agents, then identify the ceteris-paribus conditions. The model is a disciplined simplification, not a complete description of reality.
- Define the central variables precisely.
- Identify the agents making decisions.
- State what is held constant and why that matters.
02Evidence
Apply evidence and data
A regional economy experiences higher household saving and a new export contract.
Application in circular flow of income means using scale, direction, timing and source to alter the argument. Explain how the evidence changes the mechanism instead of merely naming the context or copying a figure.
- Check units, dates and whether values are nominal or real.
- Separate correlation from a supported causal inference.
- Identify winners, losers and the appropriate counterfactual.
03Analyse
Develop the mechanism
Injection or withdrawal changes → firms' revenue changes → income and induced consumption adjust → national income moves toward a new equilibrium.
Carry this circular flow of income chain far enough to answer the question: identify the agent's response, the resulting market or macroeconomic change and why the outcome matters.
- Explain each arrow in the chain.
- Use the diagram or calculation in the written analysis.
- Distinguish short-run adjustment from longer-run response.
04Evaluate
Evaluate assumptions and magnitude
The magnitude depends on import, tax and saving leakages, spare capacity, confidence and the time over which rounds occur.
Evaluation of circular flow of income should change confidence in the result. Test elasticity, time lags, scale, incentives, distribution and unintended effects rather than adding a generic “however”.
- Which assumption is most fragile?
- Would a different elasticity reverse or only weaken the result?
- What evidence could change the judgement?
05Judge
Reach an informed judgement
For circular flow of income, choose the argument with the greatest contextual importance and explain why it outweighs the alternative. State the conditions under which it holds rather than repeating the introduction.
The opportunity cost and distributional effect of injection matter. Political preferences may affect objectives, but the exam judgement must rest on transparent assumptions and evidence rather than ideology.
- Answer the exact command and scope.
- Rank the decisive factors.
- State a condition, timeframe and possible reason to revise the conclusion.
From theory to a testable claim
Households supply factors and receive income; firms produce output and receive expenditure. Withdrawals reduce circular spending while injections add spending from outside the core flow.
Applied taskA regional economy experiences higher household saving and a new export contract.
Causal chain
Injection or withdrawal changes → firms' revenue changes → income and induced consumption adjust → national income moves toward a new equilibrium.
Applied taskRewrite the circular flow of income chain with one piece of numerical or contextual evidence at the link where it changes the expected magnitude.
Evaluation that does work
The magnitude depends on import, tax and saving leakages, spare capacity, confidence and the time over which rounds occur.
Applied taskExplain whether this consideration weakens, delays, redistributes or reverses the predicted circular flow of income outcome.