The study of the changes in the economy's total output of goods and services over long periods of time is defined as

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Macroeconomics is the branch of economics that studies the behavior and performance of an economy as a whole. It focuses on the aggregate changes in the economy such as growth in GDP, unemployment, and inflation. Macroeconomics deals with the economy's total output of goods and services over time, distinguishing it from microeconomics, which focuses on individual markets and actors within the economy. Normative and positive economics are branches that deal with what ought to be and what is, respectively, and do not directly relate to the study of the economy's total output over long periods.

The Study of the Changes in the Economy's Total Output