Economics: Scarcity, Choices, and Incentives
Economic Thinking
Scarcity and Trade-offs
Economics begins with scarcity: resources are limited while wants are not. Because of scarcity, every choice has an opportunity cost, which is the value of the next best alternative forgone.
Core Economic Terms
Mechanism
People respond to incentives, but not always perfectly; preferences, habits, norms, and imperfect information can change outcomes.
Markets and Government
Markets
- Coordinate through prices and exchange
- Often efficient for many goods
- Can fail when external costs exist
Government
- Can regulate, redistribute, or provide public goods
- Useful when markets undersupply important services
- Can be limited by information and enforcement costs
What is opportunity cost?
Opportunity cost captures the value of what you sacrifice when making a choice.
Correct answer: The next best alternative forgone
Why do incentives matter in economics?
Incentives can change behavior by altering rewards and costs.
Correct answer: They influence how people choose among alternatives.
Policy Applications
Economic analysis helps evaluate taxes, subsidies, price controls, welfare programs, labor markets, and environmental regulation. Good policy compares intended benefits with unintended consequences.
Which situation is most likely to create an externality?
An externality occurs when a decision affects third parties not directly involved in the transaction.
Correct answer: Pollution from a factory
Give one example of an unintended consequence of a policy.
For example, a price ceiling may reduce shortages for some consumers but create black markets or lower supply.
Correct answer: Any plausible unintended effect