The 4 major sectors of an economy from the macroeconomic perspective are as follows.Households: This sector mainly comprises the consumers and contributes to the role of consumption expenditure in GDP. The members of this sector can be an individual or an entire family that makes all its economic decisions independently. Also, this sector provides the market for the output of the firms.Firms: This sector comprises the partnership firms, corporations, and sole proprietorship firms. It contributes to the investment and expenditure role in GDP.Government: As the name suggests, this sector comprises the various levels of government in a country. There are several important roles in this sector and it contributes to the government purchase role in GDP.External Sector: This sector comprises the inflow, outflow, import, and export of goods and services in an economy. The expenditures in GDP also affects this foreign sector.