The study of broad economic aggregates is called macroeconomics. This branch of economics focuses on the behavior of the economy as a whole, rather than on individual markets or businesses. It involves analyzing economic variables such as inflation, employment, gross domestic product (GDP), and national income. Macroeconomics also examines how government policies, such as monetary and fiscal policies, affect the economy. In simpler terms, macroeconomics looks at the big picture of how the economy is doing and how it can be managed to ensure sustainable growth and stability.