Chapter 2 — National Income: Exercise Solutions Guide
How to Use This Page
1. Attempt every question on your own first — read the textbook chapter, then try the exercises without looking here. 2. Use this guide to verify your answers and understand the reasoning behind each one. 3. Focus on the explanations, not just the final answer — board exams reward understanding over memorisation. 4. Practise the numerical problems multiple times; they are frequently asked in exams. 5. Revisit the "Common Mistakes" section before the exam to avoid frequent pitfalls.
Key Concepts (Quick Recap)
- National income is the total value of all final goods and services produced by the residents of a country during a financial year.
- GDP (Gross Domestic Product): Total value of output produced within the geographical boundary of a country.
- GNP (Gross National Product) = GDP + Net Factor Income from Abroad (NFIA).
- NNP (Net National Product) = GNP − Depreciation.
- National Income (NNP at factor cost) = NNP at market price − Indirect taxes + Subsidies.
- Three methods of measurement: Product method (value added), Income method (factor incomes), Expenditure method (final expenditure).
- Real income is adjusted for inflation (constant prices); Nominal income is at current prices.
- Per capita income = National Income / Population.
- Transfer payments are not included in national income because they do not correspond to any productive activity.
- Double counting must be avoided by using the value-added method or counting only final goods.
I. Choose the Best Answer (MCQs)
1. National income is also known as: (a) Gross Domestic Product (b) Net National Product at factor cost (c) Gross National Product (d) Net Domestic Product
Answer(b) Net National Product at factor cost — National income is defined as NNP at factor cost, which includes factor earnings and excludes indirect taxes and depreciation.
2. GDP + NFIA = ? (a) NDP (b) GNP (c) NNP (d) Per capita income
Answer(b) GNP — Gross National Product is obtained by adding Net Factor Income from Abroad to Gross Domestic Product.
3. Which of the following is NOT included in national income? (a) Rent (b) Wages (c) Transfer payments (d) Interest
Answer(c) Transfer payments — Transfer payments (pensions, scholarships, gifts) are not payments for productive services and are excluded from national income.
4. The value-added method measures national income by: (a) Adding up all factor incomes (b) Adding up all final expenditures (c) Subtracting intermediate consumption from gross output (d) Adding up all imports and exports
Answer(c) Subtracting intermediate consumption from gross output — The value-added method calculates value added at each stage as output minus intermediate consumption to avoid double counting.
5. Real national income is calculated at: (a) Current prices (b) Constant (base year) prices (c) Market prices (d) Factor cost
Answer(b) Constant (base year) prices — Real income eliminates the effect of price changes by using base year prices, thus reflecting actual changes in output.
6. Per capita income is obtained by dividing national income by: (a) Number of workers (b) Number of households (c) Total population (d) Number of taxpayers
Answer(c) Total population — Per capita income = National Income / Total Population. It indicates the average income per person.
7. Which of the following is an intermediate good? (a) A car purchased by a household (b) Steel used by an automobile company (c) A refrigerator bought by a restaurant (d) A computer purchased by a school
Answer(b) Steel used by an automobile company — Steel used in production is an intermediate good because it is used up in the manufacturing process. The other items are final goods.
8. NNP at market price − Indirect taxes + Subsidies = ? (a) GDP at factor cost (b) NNP at factor cost (c) GNP at market price (d) NDP at factor cost
Answer(b) NNP at factor cost — This formula converts from market prices to factor cost by removing the distortion of indirect taxes and adding subsidies. NNP at factor cost is the true national income.
9. Depreciation is also called: (a) Capital consumption allowance (b) Net investment (c) Gross investment (d) Inventory investment
Answer(a) Capital consumption allowance — Depreciation represents the wear and tear of capital goods during production and is also referred to as capital consumption allowance.
10. The expenditure method calculates national income as: (a) C + I + G + (X − M) (b) W + R + I + P (c) Gross output − Intermediate consumption (d) National income / Population
Answer(a) C + I + G + (X − M) — The expenditure method sums up Consumption (C) + Investment (I) + Government spending (G) + Net exports (X − M) to arrive at GDP.
II. Fill in the Blanks
1. GNP = GDP + Net Factor Income from Abroad.
2. National income is measured as NNP at factor cost.
3. NNP = GNP − Depreciation.
4. Per capita income = National Income / Population.
5. Real national income is calculated at constant (base year) prices.
6. Nominal national income is calculated at current prices.
7. Transfer payments are excluded from national income because they do not involve production of goods or services.
8. The value-added method avoids double counting by subtracting intermediate consumption from gross output.
9. GDP at market price = C + I + G + (X − M) by the expenditure method.
10. NNP at factor cost = NNP at market price − Indirect taxes + Subsidies.
III. True or False
1. National income includes transfer payments. False. — Transfer payments (pensions, gifts, scholarships) do not correspond to any productive activity and are excluded from national income.
2. GNP is always greater than GDP. False. — GNP = GDP + NFIA. If NFIA is negative (as in countries where foreign residents earn more than the country's residents abroad), GNP can be less than GDP.
3. Depreciation is also called capital consumption allowance. True. — Depreciation measures the loss in value of capital due to wear and tear, obsolescence, and aging.
4. Real income is adjusted for inflation. True. — Real income is calculated at constant (base year) prices to remove the effect of price changes.
5. Intermediate goods are included in national income. False. — Including intermediate goods leads to double counting. Only final goods and value added are included.
6. The product method is also called the value-added method. True. — The product method measures national income by calculating value added at each stage of production (output − intermediate consumption).
7. GDP measures the income of only the citizens of a country. False. — GDP measures output produced within the geographical boundary of a country, regardless of the nationality of the producers. GNP measures income of citizens.
8. Nominal income can increase even when real output does not change. True. — If prices rise (inflation), nominal income increases even if the actual quantity of goods and services produced remains the same.
IV. Match the Following
| Column A | Column B |
|---|
| 1. GDP at market price | (a) NNP at market price − Indirect taxes + Subsidies |
| 2. GNP | (b) GDP + NFIA |
| 3. NNP | (c) GNP − Depreciation |
| 4. National Income | (d) C + I + G + (X − M) |
| 5. Value Added | (e) Output − Intermediate consumption |
Answer1 — (d) GDP at market price is calculated by the expenditure method as C + I + G + (X − M). 2 — (b) GNP = GDP + Net Factor Income from Abroad. 3 — (c) NNP = GNP − Depreciation. 4 — (a) National Income = NNP at market price − Indirect taxes + Subsidies = NNP at factor cost. 5 — (e) Value Added = Output − Intermediate consumption.
V. Answer Briefly
1. Define national income.
Answer
National income is the total money value of all final goods and services produced by the residents of a country during a given period (usually one year). It is measured as Net National Product at factor cost (NNPfc). It includes wages, rent, interest, and profit earned by the factors of production.
2. Distinguish between GDP and GNP.
Answer
| Basis | GDP | GNP | |---|---|---| | Definition | Total value of output produced within the geographical boundary | Total value of output produced by the residents of a country | | Territory | Includes output by foreigners within the country | Excludes output by foreigners but includes output by nationals abroad | | Formula | GDP = C + I + G + (X − M) | GNP = GDP + NFIA | | Focus | Domestic production | National production |
3. What are transfer payments? Why are they excluded from national income?
Answer
Transfer payments are unilateral payments made without any corresponding productive activity. Examples include old-age pensions, scholarships, unemployment benefits, and gifts. They are excluded from national income because they do not represent payment for any factor service — they are simply a redistribution of existing income, not the creation of new income.
4. What is the difference between real income and nominal income?
Answer
Nominal income is national income measured at current (prevailing) prices. It increases when either output or prices increase. Real income is national income measured at constant (base year) prices, adjusted for inflation. It reflects only changes in the actual volume of output. Real income is a better indicator of economic welfare because it eliminates the distortion caused by price changes.
5. Explain the concept of value added.
Answer
Value added is the difference between the value of output and the value of intermediate consumption at each stage of production. It avoids double counting. For example, if a farmer sells wheat for Rs. 100, a miller sells flour for Rs. 150, and a baker sells bread for Rs. 200, the total value added is Rs. 100 + Rs. 50 + Rs. 50 = Rs. 200, not Rs. 100 + Rs. 150 + Rs. 200 = Rs. 450.
6. Write a note on per capita income.
Answer
Per capita income is the average income per person in a country, calculated as: Per Capita Income = National Income / Total Population. It is a useful indicator of the standard of living, though it does not reflect income distribution. An increase in per capita income indicates improvement in average economic welfare.
7. Why are intermediate goods not included in national income?
Answer
Intermediate goods are raw materials and semi-finished goods that are used up in the production process. Including them would lead to double counting, as their value is already embedded in the final product. For example, the value of flour used in baking bread is already included in the price of bread. To avoid double counting, national income includes only final goods or uses the value-added method.
VI. Answer in Detail
1. Explain the three methods of measuring national income.
Answer
1. Product Method (Value-Added Method): - Under this method, national income is calculated by summing the value added by each producing unit in the economy. - Value Added = Value of Output − Value of Intermediate Consumption - The value added at each stage is summed to arrive at GDP at factor cost. - Advantages: Avoids double counting; reveals the contribution of each sector. - Steps: (i) Identify all producing units and classify them into primary, secondary, and tertiary sectors. (ii) Calculate value added by each unit. (iii) Sum all value added to get GDP at factor cost. (iv) Add NFIA to get national income. 2. Income Method (Factor Income Method): - Under this method, national income is calculated by summing all factor incomes earned by residents. - National Income = Compensation of employees (wages) + Rent + Interest + Profit + Mixed income of self-employed - Transfer payments are excluded because they are not earned through productive activity. - Steps: (i) Classify factor incomes. (ii) Sum all factor incomes earned. (iii) Add NFIA. (iv) This gives NNP at factor cost = National Income. 3. Expenditure Method: - Under this method, national income is calculated by summing all final expenditures on goods and services. - GDP at market price = C + I + G + (X − M), where C = Consumption, I = Investment, G = Government expenditure, X = Exports, M = Imports. - To get national income: subtract depreciation, indirect taxes; add subsidies and NFIA. - Steps: (i) Estimate final consumption expenditure. (ii) Estimate gross investment. (iii) Estimate government expenditure. (iv) Estimate net exports. (v) Sum all to get GDP at market price. (vi) Convert to national income.
2. Explain the difficulties in measuring national income in India.
Answer
Theoretical Difficulties: 1. Non-market activities: Many activities like household work, subsistence farming, and barter transactions do not have market prices but contribute to economic welfare. 2. Transfer payments: It is difficult to distinguish between factor payments and transfer payments in practice. 3. Imputed values: Services of owner-occupied houses, government services, and self-produced goods need imputation, which involves estimation. 4. Double counting: The risk of including intermediate goods is significant in an economy with many small producers. 5. Depreciation estimation: Accurately measuring the wear and tear of capital is complex. Practical Difficulties: 1. Large informal sector: A significant portion of India's economy is informal and unorganised, making data collection difficult. 2. Illiteracy: Many producers and workers are illiterate and do not maintain proper accounts. 3. Lack of reliable data: Accurate statistical data on production, income, and expenditure is not always available. 4. Diverse economy: India has vast regional, linguistic, and economic diversity, making standardised measurement difficult. 5. Underground economy: Black money and unreported transactions are not captured in national income statistics. 6. Agricultural sector complexities: Multiple cropping, mixed farming, and seasonal variation make output estimation difficult.
3. Explain the relationship between GDP, GNP, NDP, NNP and National Income with suitable formulas.
Answer
The key national income aggregates and their relationships are as follows: 1. GDP (Gross Domestic Product) at market price: GDPmp = C + I + G + (X − M) This is the total market value of all final goods and services produced within the country. 2. GDP at factor cost: GDPfc = GDPmp − Indirect taxes + Subsidies 3. GNP (Gross National Product) at market price: GNPmp = GDPmp + Net Factor Income from Abroad (NFIA) NFIA = Factor income from abroad − Factor income to abroad 4. NDP (Net Domestic Product) at market price: NDPmp = GDPmp − Depreciation 5. NNP (Net National Product) at market price: NNPmp = GNPmp − Depreciation = NDPmp + NFIA 6. National Income (NNP at factor cost): NI = NNPfc = NNPmp − Indirect taxes + Subsidies Summary chain: GDPmp → (+ NFIA) → GNPmp → (− Depreciation) → NNPmp → (− Indirect taxes + Subsidies) → NNPfc = National Income
4. What is the significance of national income accounting? Explain its limitations.
Answer
Significance of National Income Accounting: 1. Indicator of economic growth: Changes in national income over time indicate whether the economy is growing, stagnating, or declining. 2. Policy formulation: Government uses national income data to design fiscal and monetary policies. 3. Standard of living: Per capita income (derived from national income) indicates the average standard of living. 4. Sectoral contribution: National income data shows the contribution of agriculture, industry, and services, guiding sectoral priorities. 5. International comparison: National income enables comparison of economic performance across countries. 6. Business forecasting: Firms use national income trends for demand forecasting and investment planning. Limitations of National Income Accounting: 1. Excludes non-market activities: Housework, volunteer work, and subsistence production are not captured. 2. Does not reflect income distribution: A rise in national income may benefit only the rich, while the poor remain unaffected. 3. Ignores environmental degradation: GDP growth may come at the cost of pollution, deforestation, and resource depletion. 4. Quality of life not captured: National income does not measure health, education, freedom, or happiness. 5. Underground economy excluded: Black money, illegal activities, and unreported income distort the true picture. 6. Does not account for leisure: An increase in GDP due to longer working hours may not improve welfare.
Common Mistakes to Avoid
1. Confusing GDP and GNP — GDP is territory-based (within the country's borders); GNP is resident-based (by the country's nationals, wherever they are). The bridge is NFIA.
2. Including intermediate goods in national income — This causes double counting. Use only final goods or the value-added method.
3. Including transfer payments in national income — Pensions, scholarships, and gifts are not payments for productive services; they must be excluded.
4. Forgetting to deduct depreciation — Gross measures (GDP, GNP) include depreciation; Net measures (NDP, NNP) exclude it. NNP = GNP − Depreciation.
5. Mixing up market price and factor cost — Market price includes indirect taxes and excludes subsidies. Factor cost = Market price − Indirect taxes + Subsidies.
6. Confusing real and nominal income — Real income uses constant (base year) prices; nominal income uses current prices. Always specify which you are using.
Exam Checklist
- [ ] I can define national income and distinguish it from GDP, GNP, NDP, and NNP
- [ ] I can write and apply all key formulas: GNP = GDP + NFIA, NNP = GNP − Depreciation, NI = NNPmp − Indirect taxes + Subsidies
- [ ] I can explain the three methods of measuring national income (product, income, expenditure)
- [ ] I can solve numerical problems on GDP, GNP, NNP, and national income
- [ ] I can distinguish between real income and nominal income
- [ ] I can explain why transfer payments and intermediate goods are excluded
- [ ] I can list the difficulties in measuring national income in India
- [ ] I can explain the significance and limitations of national income accounting
