1. Define a production possibility curve (PPC). [2 marks]
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A production possibility curve (PPC) is a diagram that shows all the possible combinations of two goods that an economy can produce with its available resources and technology. (2 marks) Level of response: - 2 marks: Clear and accurate definition. - 1 mark: Basic or incomplete definition. - 0 marks: Incorrect or no response.
2. State one reason why a point might lie beyond a PPC. [1 mark]
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A point might lie beyond a PPC if the economy is producing more than its current resources and technology allow, which could be due to improved technology, better use of resources, or increased investment. (1 mark) Level of response: - 1 mark: Any one valid reason. - 0 marks: Incorrect or no response.
3. Identify the label that represents a point inside the PPC. [1 mark]
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The label that represents a point inside the PPC is A. (1 mark) Level of response: - 1 mark: Correct identification. - 0 marks: Incorrect or no response.
4. Explain what is meant by a movement along a PPC. [3 marks]
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A movement along a PPC occurs when an economy reallocates its resources from the production of one good to another. This means the economy is producing a different combination of goods, but still using all its resources efficiently. For example, if an economy moves from producing 10 units of good X and 20 units of good Y to producing 15 units of good X and 15 units of good Y, it is a movement along the PPC. (3 marks) Level of response: - 3 marks: Clear explanation with an example. - 2 marks: Basic explanation or no example. - 1 mark: Incomplete or incorrect explanation. - 0 marks: No response.
5. Analyse the effects of a shift in a PPC to the right. [4 marks]
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A shift in a PPC to the right indicates that the economy can now produce more of both goods. This could be due to an increase in resources, such as labour or capital, or improvements in technology. For example, if a country discovers new oil reserves, it can produce more oil and other goods, shifting the PPC to the right. However, the opportunity cost of producing one good in terms of the other may also change. (4 marks) Level of response: - 4 marks: Clear analysis with a relevant example and discussion of opportunity cost. - 3 marks: Basic analysis or no example. - 2 marks: Incomplete or incorrect analysis. - 1 mark: Minimal response. - 0 marks: No response.
6. Calculate the opportunity cost of producing one additional unit of good X, given the following data:
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The opportunity cost of producing one additional unit of good X is 1 unit of good Y. (3 marks) Level of response: - 3 marks: Correct calculation with clear working. - 2 marks: Correct answer but no working. - 1 mark: Incorrect calculation. - 0 marks: No response.
7. Discuss the factors that could cause a PPC to shift to the left. [6 marks]
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A PPC shifting to the left indicates that the economy can produce less of both goods. This could be due to several factors: - A decrease in resources, such as a reduction in the labour force due to emigration or a natural disaster. - A decrease in the quality of resources, such as a decline in the quality of land for agriculture. - A decrease in technology, such as a loss of knowledge or a reduction in research and development. - A decrease in investment, such as a reduction in capital goods or infrastructure. For example, if a country experiences a significant emigration of skilled workers, it may have fewer resources to produce goods, causing the PPC to shift to the left. The opportunity cost of producing one good in terms of the other may also change. (6 marks) Level of response: - 6 marks: Clear discussion with multiple relevant factors and examples. - 5 marks: Good discussion but fewer factors or examples. - 4 marks: Basic discussion with minimal factors or examples. - 3 marks: Incomplete or incorrect discussion. - 2 marks: Minimal response. - 1 mark: Very limited response. - 0 marks: No response.
8. Evaluate the usefulness of PPC diagrams in explaining the concept of opportunity cost. [8 marks]
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PPC diagrams are useful in explaining the concept of opportunity cost as they show the trade-offs involved in producing different goods. The opportunity cost of producing one good is the amount of the other good that must be forgone. For example, if an economy moves from producing 10 units of good X and 20 units of good Y to producing 11 units of good X and 19 units of good Y, the opportunity cost of producing one additional unit of good X is 1 unit of good Y. However, PPC diagrams have some limitations. They assume that all resources are fully and efficiently used, which may not be the case in reality. They also assume that technology and resources are constant, which may not be true in the long run. Additionally, PPC diagrams only show two goods, which may not be representative of a complex economy. Despite these limitations, PPC diagrams are still a useful tool for explaining the concept of opportunity cost and the basic economic problem of scarcity. (8 marks) Level of response: - 8 marks: Clear evaluation with strengths and limitations, supported by examples. - 7 marks: Good evaluation but fewer strengths or limitations. - 6 marks: Basic evaluation with minimal strengths or limitations. - 5 marks: Incomplete or incorrect evaluation. - 4 marks: Minimal response. - 3 marks: Very limited response. - 2 marks: Only strengths or limitations. - 1 mark: Very limited response. - 0 marks: No response.