Macroeconomics is a branch of economics that deals with the performance,
structure, behavior, and decision-making of an economy as a whole. This
includes national, regional, and global economies. Macroeconomists study
topics such as output/GDP (gross domestic product) and national income,
unemployment (including unemployment rates), price indices and inflation,
consumption, saving, investment, energy, international trade, and
international finance.
Macroeconomics and microeconomics are the two most general fields in
economics. The focus of macroeconomics is often on a country (or larger
entities like the whole world) and how its markets interact to produce large-
scale phenomena that economists refer to as aggregate variables.