The Examiner's Vault: How to Answer the CIE 9708 PPC Question
Updated: Sep 15
Welcome to The Examiner's Vault, where we take the hardest past paper questions from the Cambridge International (CIE 9708) Economics syllabus and break down exactly what the examiner is looking for.
Today, we are looking at a classic microeconomics question from Chapter 1. It might look simple, but thousands of students drop easy marks here because they fail to properly link theory to application.
The Question:
"Explain the concept of the Production Possibility Curve and how it illustrates opportunity cost" *(4 Marks - 9708 Specimen Paper 2, Q1)*
📝 The Bullet Point Plan (1 to 2 minutes in exam):
Before you start writing, you should always spend 60 seconds planning. Here is the blueprint for a perfect 4-mark answer:
Define the Production Possibility Curve (PPC).
Explain opportunity cost using movement along the PPC.
Provide a relevant real-world example to illustrate opportunity cost.
Mention the typical shape of the PPC and why it is concave.
✍️ The Basic Answer:
[DEFINE] The Production Possibility Curve (PPC) is a graphical representation of the maximum possible combinations of two goods or services that an economy can produce using its available resources and technology. It highlights the concepts of scarcity, trade-offs, and efficient resource allocation.
[EXPLAIN] The PPC illustrates opportunity cost, which refers to the value of the next best alternative forgone. Movement along the curve demonstrates that reallocating resources to increase the production of one good results in the reduction of another good, showing the trade-offs involved in resource allocation.
[APPLY] Real-world example: During the COVID-19 pandemic, governments reallocated resources toward healthcare, such as vaccine production and hospital expansions. This shift came at the expense of reduced investment in other sectors, such as infrastructure and tourism, clearly demonstrating opportunity cost.
The full answer, free
The text above is good, but is it enough to support a high-level response?
To get the top marks, you must accurately draw the mathematical diagram, understand exactly how the examiner awards points, and provide an Evaluation Matrix.
The model answer for this exact question is on the portal, with the production possibility curve diagram, the full model answer and the evaluation points. There is no payment and no account. Open the free notes and practice.
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