Welcome to Economic Methodology!
Hi there! Welcome to your first steps in Economics. Before we start talking about prices, markets, and money, we need to understand how economists think. This chapter, Economic Methodology, is like the "instruction manual" for the subject. We will learn how economists build theories and, most importantly, how to tell the difference between a scientific fact and a personal opinion. Don't worry if it feels a bit philosophical at first—once you get the hang of it, it makes the rest of the course much easier!
1. Economics as a Social Science
You might have studied "natural sciences" like Biology, Chemistry, or Physics. Economics is a social science. This means it is a scientific study of human behavior and how people interact in society.
Why is it a "Science"?
Economists use the same logical steps as other scientists:
1. They observe behavior (e.g., people buying more bread when the price drops).
2. They form a hypothesis (a testable guess).
3. They test this hypothesis against real-world data.
4. They create a theory or model to explain their findings.
Why is it "Social"?
Unlike a chemist who can predict exactly what happens when two chemicals mix in a lab, economists study people. People are unpredictable! We change our minds, we have emotions, and we don't always act logically. This is what makes Economics so interesting—and challenging.
Quick Review:
• Social: Studies people and society.
• Science: Uses data and logic to build theories.
2. Economics vs. Natural Sciences
The biggest difference between an economist and a physicist is the "Laboratory."
The Problem of Controlled Experiments
A biologist can keep a plant in a room with controlled light and water to see how it grows. An economist cannot put the entire world’s economy into a lab. We cannot stop time or prevent other things from changing while we test a theory.
Example: If we want to see if a tax on sugar reduces obesity, we can't stop people's incomes from changing or stop a new health trend from starting at the same time. These "outside factors" make it hard to prove cause and effect.
The Economist’s Secret Weapon: Ceteris Paribus
Since we can't control the world, we use a special Latin phrase: Ceteris Paribus. It means "all other things being equal."
When an economist says, "If the price of coffee rises, the demand will fall, ceteris paribus," they are saying: "Assuming that people's incomes don't change and they don't suddenly start hating coffee, the price rise alone will make them buy less."
Memory Aid: Think of Ceteris Paribus as the "Pause Button." We pause every other part of the world so we can look at just two things (like Price and Demand) at a time.
3. Positive vs. Normative Statements
This is a favorite topic for examiners! To think like an economist, you must distinguish between facts and opinions.
Positive Statements
A positive statement is objective. It describes the world as it is. It can be tested, proven, or disproven by looking at evidence.
Example: "The unemployment rate in this country is 5%." (We can check the data to see if this is true or false).
Example: "If you increase the tax on cigarettes, fewer people will smoke." (This is a testable prediction).
Normative Statements
A normative statement is subjective. It is a value judgement based on someone's beliefs or opinions. It often uses words like "should," "ought," "fair," or "unfair." You cannot prove a normative statement right or wrong with data.
Example: "The government should increase the minimum wage to make the country fairer."
Example: "It is wrong to tax the poor more than the rich."
Common Mistake to Avoid: A positive statement doesn't have to be true. "The moon is made of green cheese" is a positive statement because we can test it (and prove it's false). A normative statement is simply untestable because it’s an opinion.
Quick Review Box:
• Positive: Fact-based, testable, "What is."
• Normative: Opinion-based, value judgement, "What should be."
4. Value Judgements and Policy
Why do different governments choose different economic policies? It’s because of their value judgements.
Economics isn't just about math; it's influenced by moral and political views.
Imagine a country has a lot of poverty.
• One economist might say: "We should tax the rich more to help the poor" (A value judgement based on equity/fairness).
• Another might say: "We should keep taxes low to encourage businesses to grow" (A value judgement based on efficiency/freedom).
How Judgements Influence Decisions
1. Moral Judgements: Decisions based on what is considered "right" or "wrong" behavior (e.g., taxing gambling because it is seen as harmful).
2. Political Judgements: Decisions based on a political party's goals (e.g., a government wanting to stay popular might avoid raising taxes even if the data says they need to).
Did you know? Even the data economists choose to look at can be influenced by value judgements! If you believe equality is the most important thing, you will focus on Gini coefficient data. If you believe growth is most important, you will focus on GDP data.
Summary: Key Takeaways
• Economics is a Social Science: It uses scientific logic but studies unpredictable humans.
• Ceteris Paribus: We assume everything else stays the same so we can build simple models.
• Scientific Method: Economists can't use labs, so they use real-world observation and "ceteris paribus" instead.
• Positive vs. Normative: Positive is a testable fact; Normative is a value-based opinion ("should").
• Value Judgements: People's views on the "best" option are always shaped by their morals and politics.
Don't worry if this seems a bit abstract! In the next chapters, we will start using these "rules of thinking" to look at how markets actually work. You're doing great!