- Economics is the study of how individuals, businesses, and governments make choices with limited resources due to scarcity. Scarcity means not having enough resources to satisfy all wants.
- People must choose how to spend their limited incomes between needs like food and shelter or wants. Businesses must decide what and how much to produce given limited profits. Governments face limits in resources and must allocate tax money.
- Opportunity cost is the best alternative given up when making a choice. For example, the opportunity cost of going to college is work experience or money earned from a job. All economic choices involve evaluating costs and benefits.