Mark Scheme
Section A — Multiple Choice Answer Key
| Question |
Answer |
Question |
Answer |
| 1 |
B |
11 |
C |
| 2 |
A |
12 |
C |
| 3 |
C |
13 |
B |
| 4 |
C |
14 |
C |
| 5 |
B |
15 |
C |
| 6 |
B |
16 |
C |
| 7 |
C |
17 |
C |
| 8 |
B |
18 |
B |
| 9 |
C |
19 |
A |
| 10 |
A |
20 |
A |
Detailed Marking Guidance
Question 1: The correct answer is B. The fundamental economic problem is scarcity - unlimited wants/needs versus limited resources. Option A refers to a specific government problem, not the universal economic problem. Option C is a particular economic issue, not the fundamental problem. Option D is about distribution, which is a consequence of scarcity, not the problem itself.
Question 2: The correct answer is A. Opportunity cost is what must be given up to produce something else. If the farmer produces 100 kg of yam, they forgo the opportunity to produce 80 kg of cassava on that same land. The opportunity cost is expressed in terms of the next best alternative forgone, which is 80 kg of cassava.
Question 3: The correct answer is C. Land as a factor of production receives rent as its reward. Labour receives wages, capital receives interest, and enterprise receives profit. This is standard economic classification of factor rewards.
Question 4: The correct answer is C. Point C lies inside the production possibility curve, indicating that resources are not being fully or efficiently utilized. Point A lies outside (currently unattainable). Point B lies on the curve (productively efficient).
Question 5: The correct answer is B. In a market/free enterprise economy, production decisions are guided by consumer demand (willingness to pay) and producers' profit motives. Option A describes a command economy. Option C describes a traditional economy. Option D is incorrect as trade unions don't determine production decisions.
Question 6: The correct answer is B. A movement along a demand curve occurs when the price of the good itself changes, resulting in a change in quantity demanded. All other options (A, C, D) would cause a shift of the entire demand curve.
Question 7: The correct answer is C. Equilibrium occurs where quantity demanded equals quantity supplied, which is at price $4.00 where both equal 300 units.
Question 8: The correct answer is B. A maximum (ceiling) price below equilibrium creates excess demand (quantity demanded exceeds quantity supplied), resulting in a shortage. A surplus would occur with a minimum price above equilibrium.
Question 9: The correct answer is C. Improved technology reduces production costs and allows suppliers to produce more at each price level, shifting supply rightward. Option A causes movement along the curve. Option B increases costs (leftward shift). Option D affects demand, not supply.
Question 10: The correct answer is A. Price elasticity of demand (PED) specifically measures the responsiveness/sensitivity of quantity demanded to changes in the product's price.
Question 11: The correct answer is C. A PED of 0.5 (less than 1) indicates inelastic demand - quantity demanded changes proportionally less than the price change. Elastic demand has PED > 1, unitary elastic has PED = 1.
Question 12: The correct answer is C. Private limited companies (and public limited companies) have limited liability, meaning owners' personal assets are protected. Sole traders and most partnerships have unlimited liability.
Question 13: The correct answer is B. Division of labour refers to breaking down the production process into specialized tasks performed by different workers, increasing efficiency and productivity.
Question 14: The correct answer is C. Raw materials are variable costs - they vary with the level of output. Options A, B, and D are fixed costs that don't change with output in the short run.
Question 15: The correct answer is C. Economies of scale occur when long-run average cost (LRAC) decreases as output increases, typically due to bulk buying, specialization, or technical efficiencies.
Question 16: The correct answer is C. The money supply includes currency (notes and coins) in circulation plus demand deposits (checking accounts) - essentially money readily available for transactions. Accept: M1 definition of money supply.
Question 17: The correct answer is C. Money as a unit of account allows us to measure and compare the value of different goods and services in common monetary terms (e.g., dollars).
Question 18: The correct answer is B. Credit unions are cooperative financial institutions owned and controlled by their members (depositors), operating on a not-for-profit basis. Commercial banks are profit-seeking institutions owned by shareholders.
Question 19: The correct answer is A. National income measures the total value of all goods and services produced in an economy during a given period (GDP/GNP approach). Option B describes GDP per capita. Option C is government revenue only. Option D is net exports (balance of trade).
Question 20: The correct answer is A. Inflation is defined as a sustained/persistent increase in the general price level over time. Option B describes a price increase for one good. Options C and D may be related to inflation but don't define it.
Sample Answers with Examiner Commentary
Note: As this is a Paper 1 (Multiple Choice) examination consisting entirely of objective questions worth 3 marks each, there are no extended-response questions requiring sample answers with examiner commentary. In the CXC CSEC Economics examination structure:
- Paper 1 (Multiple Choice) consists of 60 multiple choice questions, each worth 1 mark, for a total of 60 marks
- Paper 2 (Structured Questions and Extended Response) contains the questions that would require detailed written responses with examiner commentary
However, to demonstrate examination technique and common student errors at the CSEC level, I will provide worked examples for two challenging multiple choice questions showing student reasoning:
Question 2 — Worked Example (Opportunity Cost Calculation)
Correct approach (Grade I standard):
"The farmer must choose between 100 kg yam OR 80 kg cassava on the same hectare. Opportunity cost = what is given up when making a choice. If the farmer chooses to produce 100 kg yam, they cannot produce the 80 kg cassava on that same land. Therefore, the opportunity cost of producing 100 kg yam is 80 kg cassava. Answer: A"
Examiner Commentary: This response demonstrates clear understanding of opportunity cost as the next best alternative forgone. The student correctly identifies that both options cannot be produced simultaneously on the same land, and accurately states what must be sacrificed. This reflects the precision expected at Grade I level.
Partial understanding (Grade III standard):
"Opportunity cost is what you lose. The farmer is producing yam, so they lose cassava. But they also lose the land because they're using it. The cost could be 80 kg cassava or maybe the total of everything. I think it's 80 kg cassava. Answer: A"
Examiner Commentary: This student arrives at the correct answer but shows incomplete understanding. They confuse opportunity cost with multiple losses rather than the single next best alternative. The reference to "losing the land" indicates conceptual confusion - land is the resource being used, not the opportunity cost. The reasoning is muddled, though the conclusion is correct. Marks awarded: 3/3 (correct answer selected despite weak reasoning in working).
Common misconception (Grade V standard):
"Opportunity cost means all the costs added together. The farmer uses land and produces yam and could produce cassava, so the total is 100 + 80 = 180 kg. Or maybe it's about the hectare of land being the cost. Answer: D"
Examiner Commentary: This response demonstrates fundamental misunderstanding of opportunity cost. The student attempts to add both outputs together (180 kg), confusing opportunity cost with total production or total resources. Selecting option D (1 hectare of land) shows confusion between the resource being employed and the alternative output forgone. This is a very common error at CSEC level where students treat opportunity cost as "all costs" rather than specifically the next best alternative. The student needs to revisit the basic definition: opportunity cost is the benefit of the next best alternative that is forgone when a choice is made. Marks awarded: 0/3.
Question 11 — Worked Example (Price Elasticity Interpretation)
Correct approach (Grade I standard):
"Price elasticity of demand (PED) = 0.5. Since this value is less than 1, it means the percentage change in quantity demanded is smaller than the percentage change in price. This is the definition of inelastic demand. When PED < 1, demand is inelastic. When PED > 1, demand is elastic. When PED = 1, demand is unitary elastic. Therefore, 0.5 indicates inelastic demand. Answer: C"
Examiner Commentary: Exemplary response showing complete understanding of PED classification. The student correctly interprets the numerical value, understands the significance of the value being less than 1, and demonstrates knowledge of the full classification system. The explanation is precise and uses correct economic terminology. This is Grade I standard for conceptual understanding.
Partial understanding (Grade III standard):
"PED of 0.5 is a small number, so it's inelastic. I remember that elastic is when it's easy to change, and inelastic is when it's hard to change. A small number like 0.5 means not much change happens, so it's inelastic. Answer: C"
Examiner Commentary: The student reaches the correct answer using simplified reasoning. While they correctly associate 0.5 with inelastic demand and understand that "small number = inelastic," their explanation lacks the technical precision about percentage changes and the threshold value of 1. The informal language ("easy to change," "not much change happens") suggests memorization of the concept rather than deep understanding. However, they demonstrate sufficient grasp for examination purposes. Marks awarded: 3/3.
Common misconception (Grade V standard):
"0.5 is half, so it's in the middle between 0 and 1. That means it's unitary elastic because it's in the middle, or maybe elastic because 0.5 is closer to 1 than to 0, and 1 usually means the maximum in economics. Answer: D or maybe B"
Examiner Commentary: This response reveals fundamental confusion about PED classification thresholds. The student incorrectly treats the 0-1 range as a continuum where 0.5 is "middle ground," not recognizing that 1 is the critical threshold value. The reasoning that "0.5 is closer to 1" or that "1 means maximum" shows mathematical misinterpretation rather than economic understanding. The student has not grasped that PED values can exceed 1 significantly (e.g., PED = 5 for luxury goods). This error is typical of students who memorize numbers without understanding the economic meaning. The student must learn: PED < 1 = inelastic; PED > 1 = elastic; PED = 1 = unitary elastic. Marks awarded: 0/3.