Scarcity is the fundamental economic problem that arises because human needs and wants are unlimited, while the resources available to satisfy them are limited. It forces individuals, firms and governments to make choices about how resources are allocated.
This is part of IB Economics subtopic 1.1: What is economics? and applies to both SL and HL.
Scarce resources include the four factors of production:
- Land: natural resources such as oil, water and agricultural land
- Labour: human effort used in production
- Capital: manufactured resources such as machinery and infrastructure
- Entrepreneurship: the organization of production and acceptance of risk
Because these resources have alternative uses, choosing one use means giving up another. This creates an opportunity cost, defined as the next best alternative forgone when a choice is made.
For example, suppose a government has enough funding to build either a hospital or a railway. If it chooses the hospital, the opportunity cost is the benefits that would have been gained from the railway. The funding itself is not the opportunity cost: the forgone railway project is.
| Concept | Meaning |
|---|---|
| Scarcity | Limited resources relative to unlimited needs and wants |
| Shortage | Quantity demanded exceeds quantity supplied at a particular price |
| Opportunity cost | The next best alternative forgone |
A common misconception is that scarcity means complete absence or extreme poverty. In economics, even wealthy people and countries face scarcity because their resources cannot satisfy every possible want. Scarcity is therefore universal, whereas a shortage is a specific market condition that may be temporary.
Exam technique: For a definition question, state both sides of the problem: unlimited needs and wants and limited resources. For an explain question, develop the chain: scarcity forces choice, choice creates opportunity cost, and this requires resource allocation. A production possibilities curve may be used to illustrate these relationships.