Question

Why are exports included and imports excluded in the estimation of national income?

Answer 1

In the expenditure method of measuring national income, exports are included and imports are excluded for two main reasons:

1. Exports represent foreign spending on domestic goods and services. These goods and services are produced within the domestic territory of the country. Since they reflect the value of production that took place inside the country, they are added to measure the total domestic output. In other words, exports are part of the country's Gross Domestic Product (GDP).
2. Imports are subtracted because they represent spending on goods and services produced in other countries. Although this spending is made by domestic residents, the production takes place outside the domestic territory, so it must be excluded to correctly measure the total domestic production.

Hence, to estimate national income correctly using the expenditure approach, net exports (exports minus imports) are included. This ensures that only the value of goods and services produced within the country is counted.

Formula:

Net Exports = Exports − Imports

National Income (by expenditure method) (Y) = C + I + G + (X − M)

Where:

C = Private Final Consumption Expenditure

I = Investment (Gross Domestic Capital Formation)

G = Government Final Consumption Expenditure

X = Exports

M = Imports