JAMB Economics 2016
Questions & Answers

Students might select option A or D by confusing deficit financing with contractionary fiscal policies meant to curb economic growth. When a government engages in deficit financing, it borrows funds to spend beyond its revenue, which is designed to stimulate investment and economic activity. Common mistake: Confusing deficit financing with measures intended to reduce demand or fight inflation.

Students might choose option B or D by confusing the money market with capital markets or physical goods markets. The money market specifically deals with short-term financial instruments, providing firms with an avenue to obtain short-term funds. Common mistake: Confusing the money market with the capital market which handles long-term funds.

Students might select option B or C, mistakenly thinking profit is maximized where price equals average cost or marginal cost. A monopolist achieves optimum output strictly where marginal revenue equals marginal cost, as producing beyond this point adds more to cost than to revenue. Common mistake: Setting price equal to marginal cost instead of equating marginal revenue to marginal cost.

Students might select option A or D by assuming multiple stages apply broadly to an entire continent. According to demographic transition theory, Africa is situated in stage 2, characterized by high birth rates and declining death rates. Common mistake: Overgeneralizing multiple demographic stages to the entire continent instead of identifying stage 2.

Students might select option A or D, confusing a regional trading bloc with global market integration or a full economic union. ECOWAS represents a form of economic integration designed to foster cooperation and trade among member states in West Africa. Common mistake: Confusing regional economic integration with broader globalization.

Students might select option A, B, or D by confusing the mode with the highest numerical value, the range, or a non-repeating number. The mode is defined as the most frequently occurring value in the dataset, and 32 appears twice while all other numbers appear only once. Common mistake: Choosing the highest numerical value in the set instead of the most frequent one.

Students might mistakenly focus on consumer income because income is mentioned in the prompt, or look at the price of the good. When examining how shifts occur, consumer earnings fundamentally drive alterations in demand, making consumer income the right choice since income elasticity measures demand changes with consumer income. Common mistake: Confusing the determinant with the price itself.

Students might pick 6.00 by confusing the mean calculation with the final deviation result or select 30.00 by miscalculating totals. By finding the mean of 5 first, the individual deviations are calculated as 3, 1, 1, 3, 1, and 1, where the mean deviation works out to 10/6 which is approximately 1.67. Common mistake: Forgetting to divide by the total number of items.

Students might mistakenly select income level or savings level thinking liquidity depends entirely on wealth. Holding money for unexpected events is influenced by interest rates, affecting money-holding costs. Common mistake: Confusing transaction motives with precautionary liquidity holding costs.

Students might mistakenly think average cost would rise or reach a maximum if scale increases incorrectly. As a business expands output under scale efficiencies, average cost drops due to economies of scale reducing average cost as output increases. Common mistake: Assuming higher output always increases expenses.

Students might mistakenly believe price incentivizes producers or that demand exceeds supply. Lower prices encourage consumers to buy more, sloping demand downward because price incentivizes consumers. Common mistake: Mixing up consumer buying behavior with producer supply responses.

Students might mistakenly think multinationals handle refinery establishment or oil marketing only. Multinationals handle oil exploration and marketing in Nigeria, covering both oil marketing and prospecting. Common mistake: Assuming foreign firms focus exclusively on retail sales.

Students might mistakenly pick cash and near money or money-market instruments assuming high liquidity is needed. Long-term investments by insurers provide capital for development, and life insurance companies contribute to development by holding assets in long-term instruments. Common mistake: Confusing short-term liquidity needs with development finance.

Students might mistakenly select average productivity or total productivity instead of the marginal unit. Wages reflect the additional output from one more worker, meaning the wage rate is mostly related to marginal productivity of labour. Common mistake: Confusing overall output with the contribution of the last worker.

Students might mistakenly choose consumers or industries thinking market forces dictate plans. The government centrally plans production in a command economy, meaning the choice of how to produce in a command economy is determined by government. Common mistake: Applying market economy principles to a centrally planned state.

Students might mistakenly use income instead of price or switch numerator and denominator. Elasticity of supply measures quantity supplied responsiveness to price, which translates to the % change in quantity supplied / % change in price. Common mistake: Mixing up supply variables with demand or income metrics.

Students might mistakenly choose population growth or the price of a substitute, which actually shift the entire supply curve rather than causing movement along it. Supply shifts due to changes in production costs, making cost of production the right answer for a change in supply of a commodity. Common mistake: Confusing a change in supply with a change in quantity supplied.

Students might mistakenly point to the board of directors or debenture shareholders assuming they shoulder business liabilities. Ordinary shareholders are paid last in liquidation, bearing the highest risk, meaning in a limited liability company, the greatest risk is borne by ordinary shareholders. Common mistake: Confusing management control with ultimate financial risk.

Students might mistakenly pick oligopoly or monopolistic competition where substitutes exist. A monopoly has no close substitutes, giving significant market power, so a market with no close substitutes for goods is an example of monopoly. Common mistake: Confusing industries with differentiated products with single-firm dominance.

Students might mistakenly choose cost-push or demand-pull inflation by ignoring the unemployment aspect. Stagflation combines high inflation, unemployment, and stagnant growth, meaning an inflation with high unemployment is stagflation. Common mistake: Assuming all types of inflation feature low unemployment.

Students might mistakenly select poor management or small market size. Limited credit access restricts SMEs' investment and growth, proving that the growth of SMEs in Nigeria is hampered by poor access to credit. Common mistake: Blaming operational skills instead of financial constraints.

Students might mistakenly pick worker incentives or production cost which relate to supply. Population size increases consumer numbers, driving demand, meaning a major determinant of demand is population. Common mistake: Confusing cost-side determinants with consumer-side drivers.

Students might mistakenly drop net exports or include exports without subtracting imports. GNP = C + I + G + (X - M), including net exports, which measures Gross National Product. Common mistake: Forgetting to subtract foreign imports from total output.

Students might mistakenly choose 10 or 35 by picking boundary values without finding the center. Ordered: 10, 14, 15, 18, 22, 28, 30, 35, 38, where the median equals 22 (B). Common mistake: Forgetting to arrange numbers in ascending order before locating the midpoint.

Students might mistakenly select technology state or distribution pattern. Consumption patterns guide production in a market economy, meaning the problem of what to produce is determined by consumption pattern. Common mistake: Focusing on manufacturing capacity instead of consumer desires.

Students might mistakenly select fixing petroleum prices or developing oil areas. NNPC oversees Nigeria's oil and gas sector development, meaning the main function of NNPC is to oversee oil sector. Common mistake: Confusing a regulatory and oversight body with a retail price controller.

Students might mistakenly select low unemployment or low population growth. Underdeveloped economies have low living standards due to low income, meaning a major feature of an underdeveloped economy is low standard of living. Common mistake: Confusing high population growth with high standards of living.

Students might mistakenly believe users bear the burden entirely. Land taxes are borne by owners, as land is fixed, meaning a tax on land will ultimately fall on owners. Common mistake: Assuming renters pay property taxes in the long run when land supply is inelastic.

Students might mistakenly think it will end fuel imports entirely. Deregulation enhances market-driven pricing and distribution efficiency, meaning deregulation of Nigeria's petroleum sector will bring efficient pricing and distribution. Common mistake: Expecting price deregulation to instantly halt all imported fuel.

Students might mistakenly choose to reduce exports or predenominate currency. Devaluation makes exports cheaper, reducing payment deficits, meaning to correct a deficit balance of payments, a country can devalue its currency. Common mistake: Assuming raising import volumes helps correct trade deficits.

Students might mistakenly look at reserve depletion or depreciation. Negative net exports occur when imports exceed exports, meaning a nation's net export is negative when imports exceed exports. Common mistake: Confusing trade deficits with currency depreciation.

Students might mistakenly choose options like A, C, or D by miscalculating or incorrectly setting up the equality. To find the equilibrium price, we set quantity demanded equal to quantity supplied, giving 30 − 3P = 9P − 15. Rearranging this yields 45 = 12P, and dividing 45 by 12 results in ₦3.75. Common mistake: Failing to correctly isolate P when combining like terms across the equation.

Students might mistakenly pick options like A, B, or C thinking that climate issues or surplus labor are primary drivers. Poor infrastructure hinders Nigeria’s economic development. Common mistake: Attributing developmental hurdles to demographic or weather factors instead of infrastructural deficits.

Students might select options like A or C, confusing consumer satisfaction curves with cost constraints or production boundaries. Indifference curves show equal-satisfaction combinations of goods. Common mistake: Confusing utility maximization mappings with budget constraints.

Students might mistakenly pick option B, C, or D, confusing how demand shifts in response to price versus earnings changes. Inferior goods’ demand decreases as income rises. Common mistake: Assuming all types of goods follow a positive correlation with consumer wealth.

Students might incorrectly select options A, B, or D thinking higher member thresholds apply to this business model. A partnership requires at least two individuals. Common mistake: Confusing private or public company formation thresholds with the minimum size of a partnership.

Students might mistakenly pick options like B, C, or D, assuming costs slow down or fall when efficiency drops. Diminishing returns cause variable costs to rise faster. Common mistake: Assuming diminishing marginal returns lead to cost savings or linear increases.

Students might select options like A, B, or D, confusing monetary expenses or all used inputs with the actual trade-off made. Opportunity cost is the value of bicycles not produced when choosing cars. Common mistake: Confusing financial outlay with sacrificed alternative production.

Students might mistakenly pick options A, B, or D, thinking rates remain level or fall for wealthier earners. Progressive taxes increase as income rises to redistribute wealth. Common mistake: Confusing progressive taxation with regressive or proportional structures.

Students might select options A, C, or D, confusing wealth division metrics with market demand curves or cost analyses. The Lorenz curve shows the distribution of income or wealth in an economy. Common mistake: Confusing inequality visualization tools with price sensitivity graphs.