Chapter 1: What is Economics?

Introduction to Economics

Economics is the study of how people make choices to satisfy their wants in a world of scarcity. It is a social science that seeks to understand human behavior, particularly the decisions individuals and societies make regarding the allocation of limited resources.

• Economics is distinct from other social sciences (like psychology, sociology, and anthropology) because it focuses on choices, scarcity, and incentives.

• Economics emerged as a formal discipline with Adam Smith’s The Wealth of Nations in 1776.

What Makes Economics Unique?

Economics is particularly concerned with:

• The choices people make (e.g., what to buy, how much education to pursue, whether to engage in certain behaviors).

• How people respond to scarcity (e.g., limited food, housing, or time).

• The incentives that influence decisions (e.g., prices, health risks, social pressures).

Microeconomics vs. Macroeconomics

Economics is divided into two main branches:

• Microeconomics: Focuses on individual people, businesses, and markets (e.g., consumer choices, business pricing, effects of taxes on specific industries).

• Macroeconomics: Focuses on the economy as a whole, including national and global issues (e.g., unemployment rates, inflation, GDP, purchasing power over time).

Key Topics in Macroeconomics

• How trade benefits societies

• Measuring productivity and unemployment

• Understanding inflation and its causes

• The role of central banks (e.g., the Federal Reserve)

• Thinking like an economist

Basic Economic Vocabulary

• Goods: Physical items that people value and are willing to pay for (e.g., cars, food, clothing).

• Services: Tasks performed for others that provide value (e.g., massages, bus rides, education).

Three Fundamental Economic Questions

Economics seeks to answer:

• What goods and services are produced?

• How are these goods and services produced?

• For whom are these goods and services produced?

What Gets Produced?

• Example: How many gasoline-powered vs. electric vehicles are produced in a given year?

How Are Goods and Services Produced?

Production requires four factors:

1. Land (natural resources: fields, oil, water, air)

2. Labor (human effort, both physical and mental; productivity can be increased through human capital—knowledge and skills)

3. Capital (non-human tools, machines, buildings used in production)

4. Entrepreneurship (organizing land, labor, and capital to create value)

Who Gets the Goods and Services?

• Land earns rent

• Labor earns wages

• Capital earns interest

• Entrepreneurship earns profit

These incomes determine individuals’ ability to purchase goods and services.

Self-Interest vs. Social Interest

Economists distinguish between:

• Selfishness: Acting with little concern for others’ well-being (negative connotation).

• Self-interest: Making choices that are best for oneself, based on personal preferences and available options (not necessarily selfish).

Case Study: Self-Interest

• Both the Big Bad Wolf (seeking food) and Little Red Riding Hood (helping her grandmother) act out of self-interest, though their actions have different moral implications.

Social Interest

Social interest refers to the best possible outcome for society as a whole. However, because resources are scarce, achieving the ideal (everyone has everything they want) is impossible. Economists use concepts like efficiency and fairness to evaluate social outcomes.

Efficiency and Fairness

• Efficiency: A situation is efficient if it is not possible to make someone better off without making someone else worse off (Pareto efficiency).

• Fairness: Economists have no technical definition; perceptions of fairness often relate to inequality, but definitions vary.

Example: Opening a new business (e.g., Walmart on campus) can be efficient if it makes at least one person better off without making others worse off, even if the distribution of benefits seems unequal.

How Economists View Human Decisions: Six Key Ideas

1. Choices are Tradeoffs: Every decision involves giving up one thing to get another due to scarcity.

2. People Make Rational Choices: Individuals weigh all available options and choose what is best for them (rational choice theory).

3. Benefit is What You Gain: The benefit is the pleasure or satisfaction received from a choice, which varies by individual.

4. Cost is What You Must Give Up: The opportunity cost is the highest-valued alternative forgone when making a choice.

Example: If you choose to visit your family, the opportunity cost is $200 (the value of hanging out with friends, the highest-valued alternative).

5. People Make Decisions at the Margin: Decisions are made by considering the additional (marginal) benefit and marginal cost of one more unit of something.

6. Choices Respond to Incentives: People’s behavior can be influenced by changing the incentives they face (e.g., taxes, subsidies, regulations).

Positive vs. Normative Statements

• Positive statements: Claims about what is, can be tested or verified (e.g., "If you attend class, you’ll get a better grade").

• Normative statements: Claims about what ought to be, based on opinion or values (e.g., "Everyone should attend class every day").

Economists focus on positive statements, especially those involving cause and effect, and use models to test them.

Economists as Policy Advisers

While economics does not set society’s goals, it provides tools to achieve given objectives efficiently, with the greatest benefit and lowest cost, by designing effective incentives.