What is economics?
IB Economics Higher LevelΒ· Unit 1: Introduction to Economics, Topic 1Β· 10 min read
1. The Core Problem: Scarcity and Unlimited Wantsβ βββββ± 3 min
Scarcity
The fundamental economic condition that arises when finite resources are insufficient to satisfy all unlimited human wants and needs.
Example:
A household with \$1000 monthly disposable income cannot afford all the goods and services it desires.
Scarcity is a universal condition that affects all societies, regardless of their level of development or income. Even the wealthiest countries have limited factors of production (land, labor, capital, entrepreneurship) to produce goods and services, so all societies must make choices about what to produce.
A student has 2 hours of free time before their economics exam. They can either study to improve their score or go out with friends. Explain how scarcity applies to this situation.
- 1
First, identify the limited resource in this scenario: time is fixed at just 2 hours, so it is scarce.
- 2
Next, identify the two competing wants the student has: a higher exam score from studying, and enjoyment from spending time with friends.
- 3
The 2 hours cannot be used fully for both activities, so the student cannot satisfy both wants at the same time. This confirms that scarcity applies here.
2. The Core Definition of Economicsβ βββββ± 4 min
Economics
The social science that studies how individuals, firms, governments and societies allocate scarce resources to satisfy unlimited human wants, and the outcomes of these choices.
Example:
Economics studies how a consumer chooses what to buy with a limited budget, and how a government chooses how to spend tax revenue.
The entire discipline of economics exists because scarcity forces choice: if resources were unlimited and all wants could be satisfied, there would be no need to study allocation decisions. IB exam mark schemes explicitly require both scarcity and unlimited wants to be included in a full definition of economics.
A politician claims: "Once a country achieves high economic growth, it eliminates scarcity, so economics is no longer needed." Evaluate this claim using core economic principles.
- 1
Recall that scarcity is defined as limited resources relative to unlimited wants. Economic growth increases the amount of goods and services a country can produce, but does not make resources unlimited.
- 2
As a country's income rises, human wants continue to expand: new products, higher living standards, and new desires emerge, so wants remain unlimited even with higher output.
- 3
The country still must make choices about how to allocate its larger but still limited resource base, so scarcity remains, and economics is still relevant. The claim is incorrect.
3. Microeconomics vs Macroeconomicsβ β ββββ± 3 min
IB Economics splits the study of the discipline into two core branches, which are covered separately throughout the course. The key difference between the two is the scope of analysis: individual units vs the entire economy.
Microeconomics
The branch of economics that studies the behavior and decision-making of individual economic units: individual consumers, individual firms, and individual single markets.
Macroeconomics
The branch of economics that studies the behavior and performance of the entire economy as a whole, focusing on aggregate economy-wide changes.
Classify each of the following topics as microeconomics or macroeconomics: (1) The impact of a sales tax on the price of coffee, (2) The change in a country's national unemployment rate between 2021 and 2022.
- 1
The first topic analyzes the impact of a tax on a single individual market (coffee). This is focused on an individual economic unit, so it is classified as microeconomics.
- 2
The second topic analyzes an aggregate measure (total unemployment) for the entire national economy. This is focused on the whole economy rather than individual units, so it is classified as macroeconomics.
4. Common Pitfalls
Wrong move:
Claiming scarcity only affects poor people or poor countries.
Why:
Scarcity is a universal condition caused by unlimited wants relative to limited resources, not low income.
Correct move:
Recognize that scarcity applies to all individuals and all economies, regardless of their income level.
Wrong move:
Defining economics without mentioning both scarcity and unlimited wants.
Why:
IB exam mark schemes require both core elements of the definition to award full marks.
Correct move:
Always include both 'limited scarce resources' and 'unlimited human wants' when defining economics.
Wrong move:
Automatically classifying any topic involving government as macroeconomics.
Why:
Government intervention can happen in individual markets, which is still a microeconomic topic.
Correct move:
Classify based on scope: individual market = microeconomics, whole economy = macroeconomics, regardless of government involvement.
Wrong move:
Thinking economics is only about money, business, and finance.
Why:
Economics is a social science that studies all choices made under scarcity, including non-market choices.
Correct move:
Recognize economics applies to any situation involving choice from scarce resources, not just commercial business activity.
5. Quick Reference Cheatsheet
Key Term | Core Definition |
|---|---|
Scarcity | Finite resources insufficient for unlimited wants |
Economics | Study of allocating scarce resources to meet unlimited wants |
Microeconomics | Study of individual consumers, firms, and single markets |
Macroeconomics | Study of aggregate performance of the entire economy |
When this came up on past exams
AI-estimated based on syllabus patterns β cross-check with official past papers for accuracy. Use only as revision-focus signals.
- 2022 Β· Paper 1
Define economics and scarcity
- 2023 Β· Paper 1
Distinguish micro vs macroeconomics
What's Next
Now that you understand the core definition of economics and the fundamental problem of scarcity, the next step is to explore the key implication of scarcity: every choice requires giving up something else of value, captured by the concept of opportunity cost. Opportunity cost is one of the most frequently tested core concepts in IB Economics, and it forms the basis of the production possibilities curve (PPC) model, which you will learn next. Understanding opportunity cost also builds the foundation for analyzing trade-offs made by individuals, firms, and governments, a key skill for all IB Economics exam papers.