Economics can be broadly divided into two categories: microeconomics and macroeconomics. Macro economics studies the economic system in aggregate, while micro-economics studies the behaviour of an individual decision-making economic unit like a firm, a consumer, or an individual supplier of some factor of production.
Macro-economics relates to issues such as determination of national income, savings, investment, employment at aggregate levels, tax collection, government expenditure, foreign trade, money supply, price level, etc.
