JAMB Economics 2009
Questions & Answers

Students might mistakenly choose unemployment of resources, thinking joblessness is the primary global hardship. However, the fundamental economic problem stems from the scarcity of resources relative to unlimited human wants, which forces all societies to make difficult choices regarding resource allocation. Common mistake: Confusing a specific economic symptom like unemployment with the core root problem of scarcity.

A student might incorrectly select reducing income tax, believing it leaves more money in consumers' hands during economic strain. In a mixed economy, increasing productivity is an effective way to control inflation because it enhances the overall supply of goods and services, which directly reduces upward pressure on prices. Common mistake: Assuming fiscal policies that stimulate consumer spending will help lower inflationary price levels.

Options mentioning the excess of expenditure over utility might look attractive due to confusing cost with value. Consumer surplus represents the difference between what consumers are willing to pay based on their marginal utility and the actual price they end up paying for a good. Common mistake: Confusing consumer surplus with total expenditure or total utility.

A student might guess composite demand by confusing mutually exclusive choices with goods that serve multiple purposes. Competitive demand occurs when two goods act as substitutes, meaning that choosing one explicitly excludes the demand for the other, such as choosing between tea and coffee. Common mistake: Confusing competitive demand with composite or complementary demand.

An option like the arithmetic mean might be chosen by confusing measures of central tendency for an odd number of scores. The median of an odd-numbered dataset is specifically the middle value located right in the center when all the scores are properly arranged in ascending order. Common mistake: Confusing the median with the mean or mode of a dataset.

Students might mistakenly choose average product options because they confuse the peak of total output with average productivity curves. Total output reaches its absolute maximum point precisely when the marginal product equals zero, since any additional inputs beyond this point will no longer increase output. Common mistake: Believing that total output peaks when marginal product is at its highest point rather than when it hits zero.

Options stating that minimum price legislation will increase demand might be selected by misinterpreting how price floors affect consumers. When a government sets a minimum price above the equilibrium level, it artificially raises prices, which reduces the quantity demanded while simultaneously encouraging higher supply, thereby creating a surplus. Common mistake: Assuming higher prices set by the government will encourage higher consumer demand.

A student might mistakenly choose the lowest average cost points by confusing profit maximization with pure cost minimization. In a perfectly competitive market, the optimal range of output for a firm occurs where marginal cost is rising and equals marginal revenue, ensuring efficient production and maximum profit. Common mistake: Assuming a firm operates best where average costs are at their absolute minimum.

An option like average total cost might be selected by assuming firms must cover all costs in the short run to supply goods. The short-run supply curve for a perfectly competitive firm is determined by the portion of its marginal cost curve that lies above the average variable cost, because the firm will only choose to produce if the market price covers its variable costs. Common mistake: Using the entire marginal cost curve instead of only the segment above average variable cost.

Students might incorrectly select ₦1500 by scaling the costs incorrectly or misapplying the unit change. The total cost for 60 units is found by multiplying the average total cost by the new quantity, which gives ₦20 multiplied by 60 units, resulting in ₦1200. Common mistake: Adding the initial cost figure directly instead of applying the constant average total cost to the new quantity.

Options like stagflation might be chosen due to general confusion over macroeconomic terminology. When the circulation of money increases without a corresponding rise in output, aggregate demand grows too fast, causing prices to climb and resulting in inflation. Common mistake: Confusing monetary inflation with complex structural issues like stagflation.

Students might guess coins or precious metals by picturing early forms of currency rather than the earliest trade systems. During the era of barter, physical commodities such as grain or livestock served as the primary medium of exchange, functioning effectively as money. Common mistake: Forgetting that non-coin items like livestock and grain were used as money before minted coins existed.

An option such as increased capacity utilization might be picked by equating high factory usage with overall development. Economic development is properly achieved and measured when there is a sustained increase in per capita income, which reflects improved living standards and broad economic growth. Common mistake: Confusing short-term capacity changes with long-term economic development indicators.

Students might mistakenly choose exportation by confusing the goal of replacing imports with expanding foreign sales. The import-substitution strategy of industrialization is designed to encourage domestic production so that locally made goods can replace imported ones and foster local industries. Common mistake: Confusing import-substitution with export-led industrialization strategies.

Options involving product price-fixing might be selected by assuming a national oil corporation controls retail fuel prices directly. The main function of the Nigerian National Petroleum Corporation is to oversee and regulate the development of Nigeria's oil and gas sector. Common mistake: Assuming the national oil corporation acts as a direct price-fixing retail agency.

A student might mistakenly choose the balance of trade, which only accounts for physical goods, rather than the comprehensive ledger. The balance of payments is the complete record that captures all of a country's international economic transactions, including trade, capital flows, and transfers. Common mistake: Confusing the narrow balance of trade with the all-inclusive balance of payments.

Options citing natural disasters might be selected by assuming Malthus focused on environmental catastrophes rather than food production limits. In modern economies, the Malthusian theory of population is rendered ineffective primarily because of birth control measures, which limit population growth and prevent it from outpacing food supply. Common mistake: Attributing the failure of Malthus's theory to technological progress alone rather than deliberate birth control.

A student might mistakenly choose salary, confusing fixed periodic earnings with hourly compensation. The wage rate is specifically the amount paid per hour for labor performed, which is typically applied to hourly or piece-rate workers. Common mistake: Confusing the hourly wage rate with a fixed annual salary.

Students might mistakenly select stabilizing oil prices by confusing global trade rules with commodity cartel functions like OPEC. The World Trade Organization is responsible for minimizing obstacles to international trade and investment by promoting global trade and reducing barriers such as tariffs and subsidies. Common mistake: Confusing the trade-liberalizing mandate of the WTO with commodity-specific price stabilization organizations.

Students might mistakenly choose option A or D because they relate to macroeconomic imbalances, but these do not define the specific shortfall described in the question. A shortfall in total spending relative to what the economy can produce causes actual output to fall below potential output. This indicates insufficient aggregate demand in the economy. Common mistake: Confusing the output gap direction with general economic growth or inflation.