Which of the following statements about the production possibilities frontier (PPF) is correct?

Question

BlackTom AI · Accepted Answer

The PPF illustrates the maximum feasible combinations of two goods that an economy can produce using its current resources and technology.

1) Relevant concepts
- Production Possibilities Frontier (PPF): a curve showing the boundary between attainable and unattainable production combinations given fixed resources and technology.  
- Scarcity: resources are limited, so not all combinations are possible.  
- Efficiency: points on the PPF are efficient (full use of resources). Points inside are attainable but inefficient (resources underused). Points outside are unattainable with current resources/technology.  
- Opportunity cost and trade-offs: moving along the PPF requires giving up some of one good to gain more of the other.

2) Step-by-step reasoning
- The PPF’s defining role is to show limits imposed by scarce resources and current technology. That is exactly what option (a) states.  
- If an economy is on the PPF, any change to increase one good typically reduces the other — that is the trade-off and opportunity cost.

3) Illustrative numerical example
- Suppose maximum outputs are either (Good A = 100, Good B = 0) or (A = 0, B = 50) with combinations in between on the frontier. Any point like (A = 60, B = 20) that lies on the curve uses resources fully (efficient). A point (A = 30, B = 5) inside the curve is attainable but inefficient. A point (A = 120, B = 10) outside is unattainable with current resources.

4) Why (a) is correct
- Option (a) succinctly captures the PPF’s meaning: it shows limits to production with existing resources and technology, reflecting scarcity and the set of feasible production combinations.

5) Why other options are incorrect
- (b) Wrong: a point outside the PPF is not “wasting resources”; it is unattainable with current resources/technology.  
- (c) Wrong: points inside the PPF are attainable but indicate inefficiency or underused resources, not impossibility.  
- (d) Wrong: increasing one product without sacrificing the other is only possible if resources/technology change (outward shift); along the current PPF, increases in one require sacrifices in the other.

Conclusion: The correct answer is (a), which matches the provided answer.

Which of the following statements about the production possibilities frontier (PPF) is correct?单项选择题

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