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.