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The Concept of Scarcity - Coggle Diagram
The Concept of Scarcity
Introduction
Overall Statement from the IB "At the heart of economic theory is the problem of scarcity. While the world’s population has unlimited needs and wants, there are limited resources to satisfy these needs and wants. As a result of this scarcity, choices have to be made. The economics course, at both SL and HL, uses economic theories to examine the ways in which these choices are made." via the syllabus
Scarcity IB definition - "The central concept in economics, scarcity refers to the limited availability of economic resources relative to society’s unlimited demand for goods and services. Thus, economics is the study of how to make the best possible use of scarce or limited resources to satisfy unlimited human needs and wants."
Conceptual Understanding in Introduction - "The central problems of economics are scarcity and choice. This forces societies to face trade-offs, opportunity costs, and the challenge of sustainability."
This seems to be such an obvious concept in economics that it is not explicitly taught except in the introduction. However, I would imagine it can fit into any content taught in economics. Specifically in the introduction 'What is Economics'.
Microeconomic
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2.8 Market Failure - Importance of international cooperation - Global nature of sustainability issues.
The whole price mechanism, an upward sloping demand curve relies on scarcity. You've mentioned supply but also the price elasticity of supply (and demand for that matter) are affected by scarcity.
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Macroeconomics
3.4 Economics of Inequality and Poverty - measuring poverty, causes of inequality and poverty
The concept of the Long Run Aggregate Supply Curve - the factors of production are scarce. And of course by proxy the SRAS.
Theory of trade; specialisation and comparative advantage. You could even apply it to borrowing, financial markets and the reason for interest rates to ration borrowing
The Global Economy
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4.2 Types of trade protection - Quota, Subsidy