Overview
This lecture explains why economics is considered a social science, how economists use models and assumptions, the role of ceteris paribus, and the differences between natural and social science methods.
Economics as a Social Science
- Economics is a social science focusing on societies and human interactions.
- Human behavior in economics is complex and influenced by many variables.
- Economists use models to simplify and understand complex interactions.
- Models represent simplified versions of reality and can vary in complexity.
- All economic models rely on assumptions to generalize behavior and outcomes.
- Assumptions help manage the unpredictability of human behavior and changing factors.
- When evaluating models, always consider the underlying assumptions.
- Economists decide which variables to include or exclude in their analysis.
- The relationship between variables can be causal (one causes the other) or correlational (they move together but are not causally linked).
- Different economists may interpret the same data differently based on chosen variables.
The Use of Ceteris Paribus
- Ceteris paribus is a Latin term meaning "all other variables remain constant."
- It allows economists to isolate and analyze the effect of one variable on another.
- This simplification is necessary due to the multitude of factors affecting economic outcomes.
- For example, when analyzing how interest rates affect unemployment, other factors are assumed constant.
Scientific Experiments: Social vs. Natural Sciences
- Natural sciences use the scientific method to repeatedly prove relationships under controlled conditions.
- The scientific method includes defining questions, developing hypotheses, testing, gathering and analyzing data, and concluding.
- Social sciences, including economics, adapt this method due to the inability to fully control variables in human society.
- In the social scientific method, hypotheses often use ceteris paribus and rely on empirical research like surveys and observations.
- Results in social sciences can vary across researchers, times, cultures, and places.
- Economic models are refined after hypotheses are repeatedly tested and either proven or rejected in various situations.
Key Terms & Definitions
- Social Science — Study of society and human relationships.
- Model — A simplified representation of reality used to explain or predict economic behavior.
- Assumptions — Generalizations made to simplify complex real-world behaviors in models.
- Ceteris Paribus — "All other things being equal," a method to hold variables constant in analysis.
- Empirical Research — Data collected from observations, surveys, or opinion polls.
- Causation — A relationship where one event causes another.
- Correlation — A relationship where two variables move together but are not necessarily causally linked.
Action Items / Next Steps
- Review the use of models and assumptions in economics.
- Practice distinguishing between causal and correlational relationships.
- Read the next topic: Positive & Normative Economic Statements.