ProTeacher

NET Economics Unit-2

National Income: Concepts and Measurement

National Income: Concepts and Measurement – UGC NET Economics Notes

GO BACK TO UGC-ECONOMICS , or UGC Home Page

Introduction

National Income is one of the most important topics in Macroeconomics for the UGC NET Economics examination. It refers to the total value of final goods and services produced in a country during a specific period, generally one year.

The study of national income helps us understand:

  • Economic growth of a country

  • Standard of living of people

  • Production and income generation

  • Economic welfare

  • Planning and policy-making

National income accounting is also used by governments for:

  • Budget preparation

  • Economic planning

  • Inflation control

  • Employment policies

  • International comparison of economies

1. Meaning of National Income

National Income refers to the total income earned by the normal residents of a country through the production of goods and services during one year.

It includes:

  • Wages

  • Rent

  • Interest

  • Profit

Important Features:

  1. Measured in monetary terms

  2. Includes only final goods and services

  3. Calculated for a specific period

  4. Avoids double counting

  5. Includes factor incomes only

2. Circular Flow of Income

The circular flow of income explains the continuous movement of production, income, and expenditure between different sectors of the economy.

Two-Sector Economy

The economy consists of:

  1. Households

  2. Firms

Flow Process

  • Households provide factors of production to firms.

  • Firms produce goods and services.

  • Firms pay wages, rent, interest, and profit.

  • Households spend income on goods and services.

Types of Flows

Real Flow

Flow of goods and services.

Money Flow

Flow of money income and expenditure.

Leakages and Injections

Leakages

  • Savings (S)

  • Taxes (T)

  • Imports (M)

Injections

  • Investment (I)

  • Government Expenditure (G)

  • Exports (X)

Equilibrium Condition:

S + T + M = I + G + X

3. Gross Domestic Product (GDP)

Meaning

Gross Domestic Product (GDP) refers to the total market value of all final goods and services produced within the domestic territory of a country during one year.

Important Terms

  • Gross = Includes depreciation

  • Domestic = Within geographical boundaries

  • Product = Goods and services produced

GDP Formula

GDP = C + I + G + (X – M)

Where:

  • C = Consumption Expenditure

  • I = Investment Expenditure

  • G = Government Expenditure

  • X = Exports

  • M = Imports

Types of GDP

GDP at Market Price (GDPMP)

Includes indirect taxes and excludes subsidies.

GDP at Factor Cost (GDPFC)

Includes only factor payments.

Relationship:

GDPFC = GDPMP – Indirect Taxes + Subsidies

4. Gross National Product (GNP)

Meaning

Gross National Product (GNP) refers to the total market value of all final goods and services produced by the normal residents of a country during one year.

GNP includes:

  • Income earned by residents abroad

  • Excludes income earned by foreigners domestically

Formula

GNP = GDP + NFIA

Where:

NFIA = Net Factor Income from Abroad

NFIA Formula:

NFIA = Factor Income Received from Abroad – Factor Income Paid Abroad

5. Net Domestic Product (NDP)

Meaning

Net Domestic Product is GDP after deducting depreciation.

Formula

NDP = GDP – Depreciation

6. Net National Product (NNP)

Meaning

Net National Product is GNP after deducting depreciation.

NNP at Market Price is also known as National Income at Market Price.

Formula

NNP = GNP – Depreciation

7. National Income at Factor Cost

Meaning

National Income at Factor Cost refers to the sum of all factor incomes earned by normal residents of a country.

It includes:

  • Wages

  • Rent

  • Interest

  • Profit

Formula

NNPFC = NNPMP – Indirect Taxes + Subsidies

8. Personal Income

Meaning

Personal Income refers to the income actually received by individuals and households.

Formula

PI = NI – Undistributed Profits – Corporate Taxes – Social Security Contributions + Transfer Payments

9. Personal Disposable Income

Meaning

Personal Disposable Income is the income available with individuals for consumption and saving.

Formula

PDI = PI – Personal Taxes

10. Per Capita Income

Meaning

Per Capita Income refers to the average income per person.

Formula

Per Capita Income = National Income / Population

11. Nominal GDP and Real GDP

Nominal GDP

Nominal GDP is measured at current prices.

It is affected by inflation.

Real GDP

Real GDP is measured at constant prices.

It removes the effect of inflation.

Formula

Real GDP = (Nominal GDP × 100) / Price Index

12. GDP Deflator

Meaning

GDP Deflator measures the overall price level in an economy.

Formula

GDP Deflator = (Nominal GDP / Real GDP) × 100

13. Methods of Measuring National Income

There are three methods of measuring national income:

  1. Product Method

  2. Income Method

  3. Expenditure Method

14. Product Method (Value Added Method)

Meaning

Under this method, national income is measured by calculating value added at each stage of production.

Formula

Value Added = Value of Output – Intermediate Consumption

Steps

  1. Calculate value of output

  2. Deduct intermediate consumption

  3. Obtain value added

  4. Add all value added

Precautions

  • Avoid double counting

  • Include final goods only

  • Exclude transfer payments

15. Income Method

Meaning

Under this method, national income is measured as the sum of factor incomes.

Components

  • Wages

  • Rent

  • Interest

  • Profit

  • Mixed Income

Formula

National Income = Wages + Rent + Interest + Profit + Mixed Income

Precautions

  • Exclude transfer income

  • Exclude capital gains

  • Include only factor incomes

16. Expenditure Method

Meaning

Under this method, national income is measured by calculating total expenditure on final goods and services.

Formula

GDP = C + I + G + (X – M)

Components

  • Consumption Expenditure

  • Investment Expenditure

  • Government Expenditure

  • Net Exports

17. Double Counting

Meaning

Double counting refers to counting the value of the same good multiple times.

Solution

  • Use final goods method

  • Use value added method

18. Transfer Payments

Meaning

Transfer payments are payments made without any productive service.

Examples:

  • Pension

  • Scholarship

  • Unemployment Allowance

  • Old Age Pension

Transfer payments are excluded from national income.

19. Intermediate Goods and Final Goods

Intermediate Goods

Goods used for resale or further production.

Example:
Flour used in bakery.

Final Goods

Goods used for final consumption.

Example:
Bread purchased by consumers.

20. Green GDP

Meaning

Green GDP adjusts GDP by considering environmental damage and depletion of natural resources.

Formula

Green GDP = GDP – Environmental Damage – Resource Depletion

Importance

  • Measures sustainable development

  • Includes environmental welfare

  • Better indicator of economic welfare

21. National Income and Economic Welfare

National income is often considered an indicator of economic welfare.

However, higher national income does not always mean greater welfare.

Limitations

  1. Unequal distribution of income

  2. Environmental pollution ignored

  3. Non-market activities excluded

  4. Leisure ignored

  5. Harmful goods included in GDP

22. Market Price and Factor Cost

Market Price

Includes indirect taxes and excludes subsidies.

Factor Cost

Excludes indirect taxes and includes subsidies.

Relationship

Market Price = Factor Cost + Indirect Taxes – Subsidies

23. Gross and Net Concepts

Gross

Includes depreciation.

Net

Excludes depreciation.

Formula

Net = Gross – Depreciation

24. Domestic and National Concepts

Domestic Concept

Based on geographical territory.

National Concept

Based on normal residents.

Relationship

National = Domestic + NFIA

25. Important Economists

Simon Kuznets

Known for national income accounting.

John Maynard Keynes

Developed theory of national income determination.

Wassily Leontief

Developed input-output analysis.

Richard Stone

Known for social accounting.

26. Important Formula Summary

GDP = C + I + G + (X – M)

GNP = GDP + NFIA

NDP = GDP – Depreciation

NNP = GNP – Depreciation

NNPFC = NNPMP – Indirect Taxes + Subsidies

Real GDP = (Nominal GDP × 100) / Price Index

GDP Deflator = (Nominal GDP / Real GDP) × 100

Per Capita Income = National Income / Population

Value Added = Value of Output – Intermediate Consumption

27. Important UGC NET Exam Points

  1. GDP is a domestic concept.

  2. GNP is a national concept.

  3. Net concepts exclude depreciation.

  4. Transfer payments are excluded from national income.

  5. Real GDP removes inflation effect.

  6. Green GDP includes environmental concerns.

  7. Value added method avoids double counting.

  8. Factor cost excludes indirect taxes.

  9. Market price includes indirect taxes.

  10. NFIA is added to GDP to obtain GNP.

Conclusion

National Income is one of the most important and frequently asked topics in UGC NET Economics. Students should focus on:

  • Definitions and concepts

  • Relationships among aggregates

  • Numerical formulas

  • Methods of measurement

  • Welfare implications

  • Differences between concepts

A strong understanding of formulas and conceptual clarity is essential for solving both theoretical and numerical questions in the examination.

👋Subscribe to
ProTeacher.in

Sign up to receive NewsLetters in your inbox.

We don’t spam! Read our privacy policy for more info.