Economic methodology — common mistakes

In multiple-choice questions, you will often be asked to identify whether a statement is positive or normative. Look for objective, data-driven language for positive statements (e.g., 'will cause', 'leads to') and value-laden words for normative statements (e.g., 'should', 'is unfair', 'is better').

No. A positive statement is defined by its testability, not its truthfulness. A statement like 'The moon is made of cheese' is a false positive statement; it is objective and can be (and has been) refuted by evidence. It does not become a normative statement, which is a subjective value judgement that cannot be tested in the same way.

The ceteris paribus assumption is deliberately unrealistic. In the real world, multiple factors change simultaneously. However, economists use it as a scientific tool to build manageable models. By isolating the impact of a single variable (e.g., price) on another (e.g., quantity demanded), they can understand fundamental relationships. Without this simplification, economic analysis would be impossibly complex.

This is a subject of ongoing debate. While economists strive for objectivity (positive analysis), normative judgements can creep in. The choice of which economic issues to study, which variables to include in a model, and how to interpret the results of an analysis can all be influenced by the economist's own values. For example, deciding whether to focus on inflation or unemployment as a primary policy concern involves a value judgement about which problem is more harmful to society.