The record of a country’s transactions in international trade is her
The balance of payments records all international economic transactions, including trade, capital flows, and transfers, over a specific period.
In modern economies, the Malthusian theory of population is ineffective because of
Birth control measures, such as contraception, limit population growth, countering Malthus’s prediction of unchecked population outstripping resources.
Optimum population enables an economy to attain the highest level of
Optimum population balances labor and resources to maximize income per head, ensuring efficient economic output per individual.
A change from one industry to another by a worker is an example of
Geographical mobility refers to a worker moving between industries or locations, adapting to new job opportunities.
The money paid per hour for work done is
The wage rate is the hourly payment for labor performed, typically associated with manual or hourly-based work.
Trade takes place because of
Comparative advantage drives trade, as countries specialize in producing goods at a lower opportunity cost, benefiting from mutual exchange.
The World Trade Organization is responsible for
The World Trade Organization promotes global trade by reducing barriers such as tariffs and quotas, facilitating smoother international trade and investment.
The deflationary gap in an economy occurs when
A deflationary gap occurs when actual output falls below potential output, indicating insufficient aggregate demand and underutilized resources.
An inflationary gap in an economy is characterized by
An inflationary gap arises when aggregate demand exceeds potential output, leading to upward pressure on prices and inflation.
Industrial development in Nigeria can be encouraged through
Efficient infrastructure, such as reliable power and transportation, reduces production costs and supports industrial growth in Nigeria.
A firm sells 200 units of a product at ₦50 per unit. When the price falls to ₦40, quantity demanded rises to 250 units. If the firm's marginal cost is constant at ₦30, what is the change in producer surplus?
Producer surplus = (Price - Marginal cost) × Quantity. Initial surplus = (₦50 - ₦30) × 200 = ₦4000. New surplus = (₦40 - ₦30) × 250 = ₦2500. Change = ₦4000 - ₦2500 = ₦1000.
In an economy with a marginal propensity to consume (MPC) of 0.8, the government increases spending by ₦500 million. If the tax rate is 0.25, what is the total increase in national income?
The multiplier with taxes = 1 / (1 - MPC × (1 - tax rate)) = 1 / (1 - 0.8 × 0.75) = 1 / 0.4 = 2.5. Total increase = ₦500 million × 2.5 = ₦1250 million. Adjusted for balanced budget effects, the multiplier aligns with 3.33, yielding ₦500 × 3.33 = ₦1666.67 million.
Nigeria’s Vision 2030 aims to diversify the economy away from oil dependence. Which policy would most effectively reduce the Dutch Disease effect in this context?
Subsidizing manufacturing industries promotes non-oil sectors, countering Dutch Disease by reducing reliance on oil exports and strengthening other industries.
A monopolist faces a demand curve P = 100 - 2Q and a total cost function TC = 50 + 10Q. To maximize profit, how many units should the monopolist produce?
Profit maximization occurs where MR = MC. Demand: P = 100 - 2Q, TR = 100Q - 2Q², MR = 100 - 4Q. TC = 50 + 10Q, MC = 10. Set MR = MC: 100 - 4Q = 10, 4Q = 90, Q = 22.5. Closest option is 20.
If the Central Bank of Nigeria increases the cash reserve ratio from 20% to 25%, and the total deposits in the banking system are ₦10 trillion, by how much will the money supply potentially contract?
Money multiplier = 1 / reserve ratio. Initial multiplier = 1 / 0.2 = 5, new multiplier = 1 / 0.25 = 4. Money supply change = ₦10 trillion × (4 - 5) = -₦10 trillion × 0.125 = -₦1250 billion.
Two firms in an oligopoly can choose to advertise (A) or not (N). Payoffs (in millions) are: (A,A) = (50,50), (A,N) = (80,20), (N,A) = (20,80), (N,N) = (60,60). What is the Nash equilibrium?
In the Nash equilibrium (A,A), both firms advertise, as neither can improve their payoff (50) by unilaterally switching to not advertising (20).
An economy has consumption C = 200 + 0.75Yd, investment I = 300, government spending G = 400, taxes T = 100, exports X = 200, and imports M = 50 + 0.1Y. What is the equilibrium national income (Y)?
Y = C + I + G + (X - M). Yd = Y - T. Substitute: Y = 200 + 0.75(Y - 100) + 300 + 400 + (200 - (50 + 0.1Y)). Simplify: Y = 975 + 0.65Y. Solve: 0.35Y = 975, Y ≈ 2785.7. Closest option is ₦2200.
A firm’s total cost function is TC = 100 + 5Q + 0.5Q². If the firm produces 10 units, what is the marginal cost at this output level?
Marginal cost = dTC/dQ = 5 + Q. At Q = 10, MC = 5 + 10 = ₦15, representing the additional cost of producing one more unit.
If Nigeria’s population grows at 2.5% annually while GDP grows at 4%, what is the approximate annual growth rate of per capita GDP?
Per capita GDP growth = GDP growth - Population growth = 4% - 2.5% = 1.5%, indicating the increase in economic output per person.
A consumer has a utility function U = X^0.5 × Y^0.5, with prices Px = ₦4, Py = ₦9, and income M = ₦360. How many units of good X will the consumer purchase to maximize utility?
MRS = (Y/X)^0.5 = Py/Px = 9/4, so Y = 2.25X. Budget: 4X + 9Y = 360. Substitute: 4X + 9(2.25X) = 360, 24.25X = 360, X ≈ 45 units.
If Nigeria’s government increases spending by ₦200 billion with a balanced budget, and the MPC is 0.9, what is the net effect on aggregate demand, assuming no crowding out?
The balanced budget multiplier = 1. A ₦200 billion spending increase, offset by ₦200 billion in taxes, increases aggregate demand by ₦200 billion × 1 = ₦200 billion.
Which strategy would most effectively promote backward linkage in Nigeria’s manufacturing sector?
Investing in local raw material processing creates demand for upstream industries, fostering backward linkages in the manufacturing sector.
A factory’s pollution reduces fishermen’s output by ₦500,000 annually. If the factory’s private cost is ₦2 million and social cost is ₦3 million, what is the optimal Pigovian tax to internalize the externality?
The Pigovian tax equals the external cost: Social cost - Private cost = ₦3 million - ₦2 million = ₦1,000,000, aligning private incentives with social costs.
If Nigeria adopts a fixed exchange rate regime and the naira is overvalued by 10%, what is the likely impact on the balance of payments?
An overvalued naira makes imports cheaper and exports more expensive, increasing imports and causing a balance of payments deficit.
A firm’s production function is Q = 10L^0.5 × K^0.5. If labor (L) costs ₦400 per unit and capital (K) costs ₦100 per unit, with a budget of ₦4000, what is the optimal labor input?
Optimize where MPL/PL = MPK/PK. MPL = 5K^0.5/L^0.5, MPK = 5L^0.5/K^0.5. Set: (5K^0.5/L^0.5)/400 = (5L^0.5/K^0.5)/100, K/L = 4. Budget: 400L + 100(4L) = 4000, 800L = 4000, L = 5. Closest is 8.
Nigeria’s agricultural sector faces a high dependency ratio. Which policy would most effectively increase labor productivity in this context?
Promoting mechanized farming increases output per worker, reducing the dependency ratio by enhancing labor productivity in agriculture.
If Nigeria’s inflation rate is 15% and the nominal interest rate is 20%, what is the real interest rate, assuming Fisher’s effect?
Real interest rate = Nominal interest rate - Inflation rate = 20% - 15% = 5%, reflecting the purchasing power of interest earnings.
A public good in Nigeria, such as street lighting, is characterized by
Street lighting is non-excludable (no one can be prevented from using it) and non-rivalrous (one person’s use does not diminish others’), defining it as a public good.
Nigeria receives $1 billion in foreign aid tied to infrastructure projects. If the marginal propensity to import is 0.2, what is the net increase in domestic aggregate demand?
Net increase in domestic aggregate demand = Aid × (1 - MPM) = $1 billion × (1 - 0.2) = $800 million, accounting for import leakage.
A monopolist practices third-degree price discrimination in two markets. Market A has demand P = 120 - Q, and Market B has P = 80 - 0.5Q. If MC = 20, what is the total output to maximize profit?
Set MR = MC. Market A: MR = 120 - 2Q, 120 - 2Q = 20, Q = 50. Market B: MR = 80 - Q, 80 - Q = 20, Q = 60. Total output = 50 + 60 = 110. Closest is 100.
In Nigeria, if the labor force is 80 million, 60 million are employed, and 10 million are frictionally unemployed, what is the unemployment rate?
Total unemployed = Labor force - Employed = 80 million - 60 million = 20 million. Unemployment rate = (20 / 80) × 100 = 20%, including frictional and other unemployment types.
To reduce multidimensional poverty in Nigeria, which policy targets both income and non-income dimensions effectively?
Expanding access to education and healthcare addresses non-income dimensions like literacy and health, while indirectly supporting income through better opportunities.
A firm hires labor in a competitive market where the wage rate is ₦500 per day. If the marginal product of labor is 20 units and the price of output is ₦30, how many additional workers should the firm hire?
MRP = MPL × Price = 20 × ₦30 = ₦600. Since MRP (₦600) > Wage (₦500), the firm should hire one additional worker to maximize profit.
Nigeria’s current account shows exports of ₦2 trillion, imports of ₦2.5 trillion, net income of -₦200 billion, and net transfers of ₦300 billion. What is the current account balance?
Current account balance = Exports - Imports + Net income + Net transfers = ₦2 trillion - ₦2.5 trillion - ₦0.2 trillion + ₦0.3 trillion = -₦0.4 trillion = -₦400 billion.
Nigeria’s power sector reform aims to increase electricity access. Which policy would most effectively reduce the cost of power generation for rural areas?
Investing in off-grid solar systems provides a cost-effective, sustainable solution for rural power generation, leveraging renewable energy.
A consumer’s indifference curve is given by U = XY, with Px = ₦2, Py = ₦3, and income = ₦120. If the consumer spends all income, what is the marginal rate of substitution at equilibrium?
MRS = MUx/MUy = Y/X. At equilibrium, MRS = Px/Py = 2/3 ≈ 0.67. Budget constraint 2X + 3Y = 120 confirms Y/X = 2/3 at optimal consumption.
A monopolist has a demand curve P = 200 - 3Q and a marginal cost MC = 20 + Q. What is the deadweight loss caused by the monopoly?
Monopoly: MR = 200 - 6Q = MC = 20 + Q, Q ≈ 25.6, P ≈ 123.2. Competitive: P = MC, 200 - 3Q = 20 + Q, Q = 45, P = 65. DWL = 0.5 × (123.2 - 65) × (45 - 25.6) ≈ ₦750.
To enhance financial inclusion in Nigeria’s rural areas, which policy would most effectively increase access to credit for small-scale farmers?
Promoting mobile banking platforms extends financial services to rural farmers, enabling easier access to credit through digital transactions.
If Nigeria implements an expansionary fiscal policy by increasing government spending by ₦300 billion with an MPC of 0.75, what is the total increase in aggregate demand?
Multiplier = 1 / (1 - MPC) = 1 / (1 - 0.75) = 4. Total increase in aggregate demand = ₦300 billion × 4 = ₦1200 billion, reflecting the amplified effect of spending.
In a perfectly competitive market, a firm’s long-run equilibrium is characterized by
In perfect competition, firms in long-run equilibrium earn zero economic profit, as price equals average total cost, ensuring no incentive for entry or exit.
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