Why macroeconomic study is called lumping method?

The term "lumping method" in macroeconomic study refers to the approach of aggregating individual economic behaviors and activities to analyze the economy as a whole. This method simplifies complex interactions by treating various factors—such as consumption, investment, and government spending—as collective entities rather than examining each component in detail. This aggregation is essential for understanding broader economic trends and formulating policies, even though it may overlook specific nuances of individual behavior.