The Scope of Economic Science & Basic Concepts
Definitions of economics, scarcity, choice, scale of preference, opportunity cost, and the Production Possibility Curve (PPC).
A District Assembly in Ghana choosing to build a CHPS clinic instead of constructing a football pitch incurs the football pitch as its opportunity cost.
Key Syllabus Learning Objectives
- 1Explain the fundamental economic concepts of scarcity, choice, scale of preference, and opportunity cost
- 2Differentiate between accounting/monetary cost and opportunity cost with practical Ghanaian examples
- 3Construct and interpret the Production Possibility Curve (PPC)
Comprehensive Syllabus Study Notes
- Definition: Lionel Robbins defined economics as "the science which studies human behavior as a relationship between ends and scarce means which have alternative uses."
- The Core Economic Problem:
- Scarcity: Human wants are unlimited, but the productive resources (land, labor, capital, entrepreneurship) to satisfy them are finite and scarce.
- Choice: Because resources are scarce, economic agents must make choices among competing alternatives.
- Scale of Preference: A ranked list of an individual's or government's unsatisfied wants in descending order of priority, with the most urgent item placed at the top.
- Opportunity Cost: The real cost of satisfying a want, expressed in terms of the next best alternative foregone (sacrificed).
- Production Possibility Curve (PPC / PPF):
- A graphical locus showing the maximum combinations of two goods an economy can produce given fixed resources and technology.
- Points inside the PPC indicate underutilization / unemployment of resources. Points on the curve show productive efficiency. Points outside are currently unattainable.
A District Assembly in Ghana choosing to build a CHPS clinic instead of constructing a football pitch incurs the football pitch as its opportunity cost.
In WASSCE Section B essays, never define opportunity cost as money spent. Always define it as "the next best alternative forgone".
- In WASSCE Section B essays, never define opportunity cost as money spent. Always define it as "the next best alternative forgone".
- Defining economics as the study of money, which ignores scarcity and choice and loses the definition mark.
- Naming opportunity cost as the money spent instead of the next best alternative forgone.
- Drawing a production possibility frontier that shifts outward when only the price of a good changes.
- Calling a point inside the frontier inefficient without saying which resource is idle.
- Confusing a want with a demand; a demand requires both willingness and ability to pay.
- Explain the fundamental economic concepts of scarcity, choice, scale of preference, and opportunity cost
- Differentiate between accounting/monetary cost and opportunity cost with practical Ghanaian examples
- Construct and interpret the Production Possibility Curve (PPC)
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