WAEC Economics 2020
Questions & Answers

1) Distractor check: Students often mistakenly select wants or resources because these terms appear frequently in discussions about wealth, but they miss the core dilemma studied by economists. 2) Reasoning to the answer: The fundamental focus of economics is scarcity, which arises because human wants are unlimited while the available resources to satisfy them are strictly limited, compelling societies to make difficult choices regarding production and allocation. 3) Common mistake: Confusing the mere presence of resources or wants with the core economic problem of scarcity.

1) Distractor check: Inefficient use of resources or under-production might be chosen if a student confuses an expansion of productive capacity with temporary output shortfalls or idle factories. 2) Reasoning to the answer: When a production possibility curve shifts outward, it reflects an overall increase in the potential output of an economy, typically driven by technological improvements or resource accumulation, which defines economic growth. 3) Common mistake: Confusing a movement toward the curve with an outward shift of the entire curve.

1) Distractor check: Acts of nature might be incorrectly picked because land originates as a natural gift, but this ignores what actually transforms it into a productive asset. 2) Reasoning to the answer: Although land is initially a passive input provided completely by nature, it requires human labor and physical effort to organize, cultivate, and convert into a useful tool for generating output. 3) Common mistake: Forgetting that natural resources require human effort to become economically productive.

1) Distractor check: State planning committee or government department are frequently chosen by students who confuse market-driven systems with centrally planned economies. 2) Reasoning to the answer: Resource allocation in a free market relies entirely on the price mechanism, where the interplay of supply and demand communicates shifting consumer preferences and relative scarcity through price adjustments. 3) Common mistake: Mixing up free market price signaling with government-directed resource allocation.

1) Distractor check: Wages or interest are common incorrect choices if a student mixes up the factor payments associated with labor or capital versus natural resources. 2) Reasoning to the answer: Land earns rent as its specific factor payment, separating it clearly from wages earned by labor, interest paid to capital, and profits claimed by entrepreneurship. 3) Common mistake: Confusing the financial reward for land (rent) with the return on capital (interest).

1) Distractor check: Surplus might be mistakenly chosen if a student confuses price ceilings with price floors, which restrict prices from falling instead of capping them below market clearing levels. 2) Reasoning to the answer: Enforcing a price ceiling below equilibrium creates an artificial maximum, causing consumer demand to outstrip available supply as buyers rush to purchase the underpriced goods, generating a market shortage. 3) Common mistake: Confusing the market outcomes of price ceilings (shortages) with price floors (surpluses).

A student might incorrectly choose options A or D because they focus on price changes, whereas the definition of inferior goods specifically relies on how consumer earnings affect demand. Because these items feature negative income elasticity of demand, a rise in earnings causes consumers to shift toward superior alternatives, reducing the amount they buy of low-quality substitutes. Common mistake: Confusing price-demand relationships with income-demand shifts.

Option D might seem plausible because people often think satisfaction means consuming endlessly, but equilibrium is about optimization rather than exhaustion. A consumer reaches this balance when the marginal utility per unit of money spent is equal across all purchased goods, thereby achieving the highest total satisfaction from a given income. Common mistake: Assuming equilibrium means having no desire to consume more.

A student might select option A because they confuse the abundance of a commodity with its overall worth, but total utility relates to cumulative satisfaction rather than current availability. The law of diminishing marginal utility explains that when a resource is plentiful, the satisfaction gained from each extra unit drops because consumers value additional quantities much less. Common mistake: Confusing overall cumulative utility with the incremental satisfaction of an extra unit.

Option D is a tempting distractor because learners often mix up shifts in a curve with movements along it caused by price alterations. An expansion in supply is represented by a rightward shift of the supply curve, which is driven by favorable factors like technological improvements or lower production costs, allowing a larger quantity to be offered and sold at the identical price. Common mistake: Confusing a shift of the entire supply curve with a movement along it.

A student might mistakenly pick option B or D by thinking of substitutes or general market availability, but the question describes items derived from a shared source. When multiple products are generated together from a single production process, such as petroleum refining yielding kerosene and grease, an increase in the output of one naturally raises the supply and price of the others, demonstrating joint supply. Common mistake: Confusing joint production with competitive supply relationships.

Option C might be chosen if a student incorrectly assumes that equal percentage changes always result in a unit elasticity value of 1.00. Price elasticity of supply is calculated by dividing the percentage change in quantity supplied by the percentage change in price, which yields 25 percent divided by 12.5 percent, resulting in 2.00 to indicate elastic supply. Common mistake: Incorrectly computing the percentage change in quantity supplied relative to the price change.

Option A or C might look correct if the student misinterprets how livestock products relate to one another in the market. Since cattle slaughter yields both beef and hides simultaneously through the same production process, an increase in beef availability automatically causes an increase in hide availability, which is the definition of joint supply. Common mistake: Confusing joint production outputs with competitive goods.

A student might incorrectly guess option B by assuming any price hike restricts buying, but raising the price above the market clearing point alters the balance between buyers and sellers. When the price is pushed above equilibrium to $6.00 per kg, the quantity supplied exceeds the quantity demanded, resulting in excess supply or a surplus that creates downward pressure on prices. Common mistake: Confusing an above-equilibrium price condition with a market shortage.

Options B and C might be chosen because division of labor and specialists are associated with large firms, but those typically lead to economies rather than diseconomies of scale. As an organization grows very large, coordination challenges, bureaucratic delays, and communication breakdowns emerge, which push average costs upward and cause diseconomies of scale. Common mistake: Associating internal specialization with cost increases rather than efficiencies.

Option A is a plausible distractor for a student who misreads how productivity scales affect a business's financial outcomes. Increasing returns to scale mean that output grows at a faster rate than inputs, which reduces average costs and allows a firm to generate greater profits by expanding its scale of production. Common mistake: Believing that lowering output improves profitability during increasing returns.

Option B is a common wrong choice because total and marginal cost curves are frequently associated with U-shapes, leading students to misapply that shape to fixed costs. Average fixed cost is calculated as total fixed cost divided by output, meaning it declines continuously as production rises while approaching zero asymptotically without ever touching it due to persistent fixed costs. Common mistake: Assuming average fixed cost shares the U-shape of variable or marginal costs.

Option B is tempting because state-owned enterprises often struggle financially, but the public sector is generally not driven by the pursuit of huge profits. Inefficiency in public enterprises typically arises from bureaucratic red tape, political interference, and a lack of competitive pressure, resulting in inflated costs and sluggish decision-making. Common mistake: Attributing public sector inefficiency to a profit-seeking motive.

Options B, C, and D are standard wholesaler functions, but none of them directly address market fluctuations the way storage does. By warehousing goods, a wholesaler can hold stock during gluts to prevent price crashes and release those stored goods during shortages to prevent sharp price spikes, thereby stabilizing the market. Common mistake: Confusing general marketing services with the specific price-stabilizing role of storage.

Options A or B might be chosen by assuming higher earnings simply reduce all consumption or change leisure preferences arbitrarily. In the long run, higher wages increase the opportunity cost of leisure, but the income effect ultimately dominates for many workers, resulting in a backward-bending labor supply curve where higher pay leads to a reduction in the supply of labor. Common mistake: Forgetting the dominance of the income effect on long-run labor supply.