Quality corrections and additions

The confirmed academic corrections are applied across Units 1–4. The aggregate-supply table has also been rebuilt to remove nine unintended cell replacements. Existing examples awaiting verification are unchanged.

New syllabus content

Repaired comparison table

Review the SRAS/LRAS shifter table →

Targeted wording corrections

Unit 1: government intervention in markets

Before: Consumers are less responsive to the price rise, so producers can pass on most of the tax to consumers without losing many sales

Now: With supply unchanged, less elastic demand means consumers bear a larger share than with more elastic demand. Consumers bear most of the tax only when demand is less elastic than supply.

Why: Tax incidence depends on relative demand and supply elasticities.

Unit 3: revenue

Before: Unitary elastic (PED = 1)

Now: Unitary throughout the relevant price range (|PED| = 1)

Why: Match Unit 1 and distinguish constant unit elasticity from a point on a straight demand curve.

Unit 3: economies and diseconomies of scale

Before: A further cause is X-inefficiency

Now: A separate cost risk is X-inefficiency

Why: Distinguish operating above attainable costs from scale diseconomies.

Unit 3: economies and diseconomies of scale

Before: in a very large firm facing less competitive pressure, average costs may end up higher than they need to be simply because management lacks the incentive to minimise costs.

Now: Weak competitive pressure may reduce the incentive to minimise costs, leaving a firm above its attainable cost at a given output. This is X-inefficiency; it can occur without an increase in scale and is distinct from diseconomies caused by managing a larger organisation.

Why: Keep the scale and efficiency concepts distinct.

Unit 3: economies and diseconomies of scale

Before: Type of diseconomy

Now: Source of higher average costs

Why: The table also includes a separate inefficiency risk.

Unit 3: economies and diseconomies of scale

Before: X-inefficiency

Now: X-inefficiency (separate from scale diseconomies)

Why: Identify the distinction in the summary table.

Unit 3: economies and diseconomies of scale

Before: Weak competitive pressure removes the incentive to minimise costs

Now: Weak competitive pressure may leave costs above the attainable level at a given output; this need not result from increased scale.

Why: Avoid treating weak competition as proof of diseconomies of scale.

Unit 3: oligopoly

Before: Non-collusive behaviour (firms actively competing) is more likely with several firms, a significant cost advantage for one firm, homogeneous products, or a saturated market.

Now: Non-collusive behaviour may be more likely when there are more firms, a strong incentive to undercut rivals or substantial differences in costs. Homogeneous products can intensify price competition, but also make prices easier to compare and deviations from an agreement easier to detect. Their effect on collusion depends on monitoring, entry barriers and the gains from cheating.

Why: Product homogeneity can support rivalry or coordination; it has no unconditional direction.

Unit 3: the determination of wage rates in competitive and non competitive markets

Before: public-sector wages held below private-sector wages → workers gradually leave the public sector for higher pay elsewhere → public sector faces a staffing shortfall → government forced to raise public-sector wages to restore supply

Now: Public-sector pay becomes less attractive relative to available alternatives → recruitment and retention may worsen → government faces pressure to improve pay or conditions. Its response depends on budgets, bargaining and policy choices; staffing shortages can persist.

Why: Align the exam chain with the qualified explanation above.

Unit 3: government intervention in product markets

Before: regulator has less information than the firm it regulates → sets price/profit cap that is too generous or too strict → intervention fails to achieve its intended outcome → a form of government failure

Now: A regulator with incomplete information may set a price or profit cap too loosely or too tightly → the policy may be less effective than intended. This constitutes government failure if its total welfare outcome is worse than the relevant alternative, not merely because the objective is only partly achieved.

Why: Failure to meet a target is not sufficient evidence of government failure.

Unit 3: size of businesses

Before: Greater focus on core business, funds raised from the sale, loss-making parts removed

Now: Greater focus may improve performance; funds are raised only if the separation involves a sale. The effect also depends on which activities are retained.

Why: Demergers do not necessarily involve a sale or guarantee stakeholder gains.

Unit 3: size of businesses

Before: Job security ↑ if loss-making parts are removed, reduced cultural conflict, greater focus improves profitability

Now: A clearer business focus may support jobs, but restructuring can also involve redundancies or weaker job security.

Why: Demergers do not necessarily involve a sale or guarantee stakeholder gains.

Unit 3: size of businesses

Before: Greater competition (more independent firms) → lower prices; more focused firms better meet consumer needs

Now: Independent firms may compete more strongly and better meet consumer needs; prices and quality depend on the resulting market structure and efficiency.

Why: Demergers do not necessarily involve a sale or guarantee stakeholder gains.

Unit 2: measures of economic performance

Before: → If the question shows ↑ PL AND ↑ real GDP → demand-pull inflation (AD shifted right)

Now: ↑ price level and ↑ real GDP are consistent with an increase in AD when SRAS is unchanged. They do not alone prove the cause: use the extract to identify the spending change and consider simultaneous supply shifts.

Why: State the one-shock model assumption.

Unit 2: measures of economic performance

Before: → If the question shows ↑ PL BUT ↓ real GDP → cost-push inflation (SRAS shifted left)

Now: ↑ price level and ↓ real GDP are consistent with an adverse SRAS shift when AD is unchanged. Check the evidence for higher costs or disrupted production before attributing the outcome to cost-push inflation.

Why: Observed outcomes do not uniquely identify a shock.

Unit 2: measures of economic performance

Before: → This distinction matters because the policy response is different: demand-pull → tighten AD (↑ interest rates); cost-push → address supply-side costs

Now: Policy depends on the source of inflation. Demand restraint addresses excessive spending; supply measures may address production constraints. With combined shocks, assess the trade-off between reducing inflation and supporting output.

Why: Avoid a rigid one-outcome/one-policy rule.

Unit 2: measures of economic performance

Before: Those on fixed incomes (pensioners, welfare recipients) suffer most because their income does not adjust to rising prices

Now: People whose nominal incomes fail to keep pace with their living costs lose purchasing power. Some pensions and benefits are uprated, although delays and differences in household spending patterns can leave recipients exposed.

Why: Distinguish fixed nominal incomes from pensioner or benefit-recipient status.

Unit 2: measures of economic performance

Before: Inflation redistributes wealth from savers (real value of savings ↓) to borrowers (real value of debt ↓) → those on fixed incomes (pensioners) are worst affected → ↑ inequality

Now: Unexpected inflation can reduce the real value of fixed nominal debts and financial assets. Effects on inequality depend on asset and debt holdings, interest rates, wage adjustments and income indexation; pensioners are not uniformly on incomes that never rise.

Why: Align the summary with the qualified explanation and indexation discussion.

Unit 2: aggregate supply

Before: If a data response question mentions rising oil prices, a weaker currency, or higher business taxes, this is a SRAS-shift signal, not a demand-side signal.

Now: Rising input prices may shift SRAS left, but a shock can affect demand as well as supply. A weaker currency can raise imported-input costs and also influence net exports; business-tax changes may affect investment. Identify each channel supported by the extract.

Why: Exchange-rate and tax shocks need not be supply-only.

Unit 2: national income

Before: The accelerator effect: the principle that investment depends on the rate of change of demand, not its level.

Now: The accelerator effect: changes in demand or output growth influence induced investment in additional capacity, subject to expectations and existing spare capacity.

Why: Distinguish induced investment from total investment.

Unit 2: national income

Before: The accelerator effect is the principle that the level of investment depends not on the level of demand, but on the rate of change of demand.

Now: The accelerator effect links induced investment to changes in demand or output. In the simple model, a faster increase in output requires a larger addition to the capital stock; replacement investment is a separate component.

Why: Clarify the simple accelerator mechanism.

Unit 2: national income

Before: When demand is growing rapidly, firms invest heavily to expand capacity to meet expected future demand; when the rate of growth of demand slows — even if demand is still positive — investment can fall sharply.

Now: When firms expect demand to grow faster, they may invest in additional capacity. If demand is still growing but more slowly, less new capacity may be needed, so induced investment can fall. Existing spare capacity and expectations affect the response.

Why: Distinguish a positive level of demand from continuing growth.

Unit 2: monetary policy

Before: the impact of a rate change or QE relies on commercial banks actually passing changes on to their own lending and savings rates and being willing to lend more — after a financial crisis, banks may stay risk-averse and tighten lending criteria regardless of the base rate, weakening the transmission mechanism.

Now: Cautious banks or weak loan demand can weaken the bank-lending channel: lending rates may adjust incompletely and cheaper finance may not produce more borrowing. QE can also work through bond yields, portfolio rebalancing, asset prices and expectations, so additional bank lending is not required for every channel to operate.

Why: Align QE evaluation with its multiple transmission channels.

Unit 4: causes and effects of globalisation

Before: Foreign direct investment (FDI): investment by a firm in productive assets or business operations in another country.

Now: Foreign direct investment (FDI): cross-border investment establishing a lasting interest and significant influence in an enterprise, conventionally indicated by at least 10% of its voting power. Full ownership or majority control is not required.

Why: Distinguish FDI from portfolio investment and full ownership.

Unit 4: causes and effects of globalisation

Before: This expansion is financed largely through foreign direct investment (FDI) — investment by a firm in productive assets (factories, subsidiaries, equity stakes) in another country.

Now: This expansion can be financed through foreign direct investment (FDI): cross-border investment establishing a lasting interest and significant influence in an enterprise, such as a subsidiary or joint venture. It does not require full foreign ownership.

Why: Use a consistent FDI definition.

Unit 4: balance of payments

Before: capital provided to, or received from, an enterprise by an investor based in another country (e.g. FDI).

Now: Cross-border investment establishing a lasting interest and significant influence in an enterprise, conventionally at least 10% of voting power. It can involve a wholly owned subsidiary or a joint venture; smaller holdings without significant influence are generally portfolio investment.

Why: Align direct-investment explanations across chapters.

Unit 4: measures to promote growth and development

Before: Development link: skills and management-expertise transfer to the domestic partner can build longer-term institutional and human capital, unlike pure FDI where control stays fully with the foreign firm.

Now: Development link: a joint venture may support skills and management-expertise transfer to the domestic partner. Compared with a wholly foreign-owned subsidiary, shared ownership can strengthen local participation, but spillovers depend on the agreement and firms’ capabilities. A cross-border joint venture can itself be FDI.

Why: A joint venture is not an alternative category to FDI.

Unit 4: patterns and volume of world trade terms of trade

Before: Cheaper imports (relative to exports) help reduce cost-push inflation

Now: If the improvement comes from lower import prices, imported inputs may become cheaper and ease cost-push pressure. A higher export-price index alone does not establish this.