Solution:The 3 methods which are used for calculating the Gross Domestic Product (GDP) are as follows :1. Product method
2. Income method
3. Expenditure method
The diminishing cost method is not used to calculate the GDP.
Gross Domestic Product (GDP) represents the final value of goods and services produced within a country's borders in a specific period, typically a year. The GDP growth rate is a crucial indicator of economic performance, reflecting health, growth, and development.
Gross Domestic Product (GDP) is calculated using three primary methods: the Production Method, Expenditure Method, and Income Method. Each approach offers unique insights into a nation's economic activities. The methods of estimation of GDP are as follows:
Income Method: It measures the total income earned by the factors of production, that is, labour and capital, within a country's domestic boundaries
GDP (as per income method) = GDP at factor cost + Taxes - Subsidies.
Expenditure Method: It calculates the total amount of money spent on products and services within a nation's borders by all entities.
GDP (as per expenditure method) = C + I + G + (X-IM)
C: Consumption expenditure,
I: Investment expenditure,
G: Government spending
(X-IM): Exports minus imports, that is, net exports.
Production (Output) Method: All commodities and services produced inside the borders of the country are valued in terms of money or market value. Real GDP, or GDP at constant prices, is calculated to prevent a skewed assessment of GDP brought on by changes in price levels. GDP (as per output method) = Real GDP (GDP at constant prices) - Taxes + Subsidies.