Economics 2023 Jamb Examination

A fall in profit margins means producers earn less from selling goods and services.
To reduce costs, firms tend to cut back on production or reduce their workforce.
This leads to job losses, causing unemployment to rise as firms lay off workers to maintain financial stability.

Underdeveloped economies are characterised by low levels of income earned per person.
Low per capita income reflects weak productivity, limited industrialisation, and widespread poverty.
Other indicators may vary, but low per capita income consistently signals underdevelopment.

Consumers face scarcity, meaning income and resources are limited.
Choosing to consume more of one product requires sacrificing some quantity of another product.
This illustrates the basic economic concept of opportunity cost in consumer behaviour.

A deflationary gap means aggregate demand is too low.
To close it, expansionary measures such as increasing government spending, reducing taxes, or expanding money supply are used.
Raising interest rates is contractionary, reducing borrowing and spending, making the gap worse rather than closing it.

Real income measures purchasing power after accounting for price changes.
If nominal income rises while prices remain constant, purchasing power improves directly.
This leads to higher real income since goods and services become more affordable relative to income.

The demand function is \(Q_d = 30 - 4P\).
At \(P = 4\):\[Q_d = 30 - 4(4) = 14\]Price elasticity of demand is given by:\[E_d = \dfrac{dQ}{dP} \times \dfrac{P}{Q}\]\(dQ/dP = -4\).
Substituting values:\[E_d = -4 \times \dfrac{4}{14} = -1.14\]Taking the absolute value for elasticity magnitude gives \(1.14\), indicating slightly elastic demand.

Macroeconomics studies the behaviour of the economy as a whole rather than individual units.
It examines aggregate sectors: households, firms, government, the corporate sector, and the external sector.
These broad groups help explain national income, inflation, unemployment, and economic growth collectively.

Import quotas are used to limit foreign competition, protect domestic industries, reduce dumping, and support employment.
They do not aim to decrease tax revenue; tariffs and quotas mainly restrict quantity, not revenue collection.
Therefore, reducing tax revenue is not a valid reason for imposing a quota.

Most West African economies rely heavily on the export of primary products such as minerals, crude oil, cocoa, and agricultural raw materials.
This dependence reflects limited industrialisation and a narrow production base common in developing economies.

Inductive reasoning involves drawing broad conclusions from specific observations or patterns.
It begins with real-world evidence and develops general principles or theories.
This contrasts with deductive reasoning, which applies general rules to specific situations.