- GDP: Value of final goods & services within country
GDP = C + I + G + (X − M) - NDP: GDP − Depreciation
- GNP: GDP + (R − P)
- NNP: GNP − Depreciation
Definitions [2]
Classical Definitions: National Income
- "The labour and capital of a country acting on its natural resources produce annually a certain net aggregate of commodities, material and immaterial, including services of all kinds. This is the true net annual income or revenue of the country or national dividend." - Marshall
- "National income is that part of the objective income of the community, including of course income derived from abroad, which can be measured in money." - Pigou
- "The national dividend or income consists solely of services as received by ultimate consumers, whether from their material or from their human environments. Thus, a piano or an overcoat made for me this year is not a part of this year's income, but an addition to capital. Only the services rendered to me during this year by these things are income." - Fisher
Modern Definitions: National Income
- "National income estimate measures the value of commodities and services turned out during a given period, counted without duplication." - N.I.C. of India
- "National income is the sum of wages, rent, interest and profit or the sum of all goods and services produced by the economy during one income period." - Shapiro
Formulae [3]
Formula: GDP by Value Added Method
\[\mathrm{GDP}\equiv\sum_{i=1}^N\mathrm{GVA}_i\]
Formula: National Income by Income Method
National Income (NI) using this income method is expressed as:
NI = R + W + I + P + MI + (X − M) + (R − P)
Where:
- R: Rent (including imputed rent of owner-occupied houses and income from government property)
- W: Wages and salaries (compensation of employees)
- I: Interest
- P: Profits (including distributed, undistributed, and corporate tax)
- MI: Mixed income of self-employed (where labour and capital income cannot be separated)
- X−M: Net exports (exports minus imports of goods and services)
- R−P: Net receipts from abroad (net income from abroad, such as factor income received from the rest of the world minus factor income paid abroad)
In words, national income is the sum of all domestic factor incomes plus net exports and net factor receipts from abroad.
Formula: National Income by Expenditure Method
National Income (NI) or Gross National Product at market prices can be written as:
NI = C + I + G + (X − M) + (R − P)
Where:
- C: Private Final Consumption Expenditure
- I: Private Domestic Investment Expenditure
- G: Government Final Consumption and Investment Expenditure
- : Net Exports (Exports minus Imports)
- : Net Receipts from abroad on account of goods and services
Key Points
Key Points: Features of National Income
- Macroeconomic concept – income of the whole economy
- Includes only final goods & services
- Avoids double counting
- Takes net value (depreciation excluded)
- Includes net income from abroad
- Measured for a financial year (1 April–31 March in India)
- A flow concept (per year)
- Expressed in money terms
Key Points: Circular Flow of National Income
- Part of macroeconomics
- Shows how income, expenditure and production move in the economy
- Flow is continuous and circular
- Households provide factors of production
- Firms provide goods and services
- Income earned is spent again, creating a cycle
Key Points: Two sector Model of Circular Flow of National Income
- Two sectors: Households & Firms
- Factor market (upper), Commodity market (lower)
- Households give factors → Firms
- Firms give goods & services → Households
- Money flow: Rent, wages, interest, profit
- Income becomes expenditure
- Flow is continuous due to unlimited wants
Key Points: Three Sector Model of Circular Flow of National Income
- Three sectors: Households, Firms & Government
- Government is added to the two sector model
- Government collects taxes from households & firms
- Government spends on public goods & services
- Income flows continuously among all three sectors
Key Points: Four Sector Model of Circular Income
- Four sectors: Households, Firms, Government & Foreign sector
- Foreign sector is added to the three sector model
- Includes exports (X) and imports (M)
- Net exports = (X − M)
- Income flows between domestic economy and rest of the world
Key Points: Different Concepts of National Income
Key Points: Concept of Green GNP
- Green GNP shows sustainable development & economic welfare.
- It adjusts GNP for environmental damage.
- Considers pollution and depletion of natural resources.
- Mere rise in GNP ≠ better quality of life.
- Ensures benefits for present & future generations.
Key Points: Difficulties in the Measurement of National Income
- Theoretical: Transfer payments, illegal income, unpaid services, self-consumption, foreign firms’ income, government services valuation, changing prices.
- Practical: Double counting, non-monetized sector, unreliable data, depreciation, capital gains/losses, illiteracy, worker classification, inventory valuation.
Key Points: Importance of National Income
- Economy: Shows total income, output, and trade.
- Policies: Basis for planning jobs, industry, and farming.
- Planning: Helps in making economic plans.
- Research: Used for economic studies.
- Living Standard: Compares wellbeing across countries/time.
- Income Distribution: Shows income inequality.
Important Questions [16]
- Explain any four features of national income.
- Find the odd word out: Features of National Income: Financial year, Money value, Static concept, Flow concept.
- Explain the two-sector model of the circular flow of National Income.
- Give an economic term: Wear and tear of capital assets due to their use in the process of production.
- Give an economic term: The gross market value of all final goods and services produced within the domestic territory of a country during a period of a year.
- Study the following table and answer the questions given below it. Components ₹ Crores Consumption (C) 800/- Investment (I) 700/- Government Expenditure (G) 400/- Net Export (X-M) -150/- Depreciation
- Complete the correlation: Output method : __________ :: Income method : Factor cost method
- In India, national income is estimated using ______.
- Complete the correlation. Output method : Product method :: ______ : Factor cost method.
- There are no theoretical difficulties in the measurement of National Income.
- Write any four practical difficulties in national income estimation.
- Write an explanatory answer. Explain the practical (statistical) difficulties involved in the estimation of national income.
- Assertion (A): Production for self-consumption is not accounted for in the national income. Reasoning (R): The products kept for self consumption do not enter the market.
- Complete the Correlation: Theoretical difficulty : Transfer payments :: ______ : Valuation of Inventories.
- Identify and explain the following concept: Vrinda receives a monthly pension of Rs. 5,000/- from the state government.
- Explain the theoretical difficulties involved in the measurement of national income.
Concepts [15]
- Concept of National Income
- Features of National Income
- Circular Flow of National Income
- Two Sector Model of Circular Flow of National Income
- Three Sector Model of Circular Flow of National Income
- Four Sector Model of Circular Income
- Different Concepts of National Income
- Concept of Green GNP
- Methods of Measurement of National Income
- Output Method/Product Method
- Income Method
- Expenditure Method
- Concept of Mixed income
- Difficulties in the Measurement of National Income
- Importance of National Income Analysis
