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Economic Theory and Public Finance
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B.A. LL.B. (Five Years) · Sem 3
2021 Mar (100 marks) Examination
munotes.in
Mumbai
B.A. LL.B. (Five Years) Sem 3 Economic Theory and Public Finance 2021 Mar (100 marks) Question Paper with Solutions
First published on munotes.in on 21 October 2026.
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Contents
The questions below are the paper as Karnataka State Law University set it at the 2021 Mar (100 marks) examination, in the order it was set.
MarksPage
The Paper as Set
The questions in this volume are the questions asked at the 2021 Mar (100 marks) examination, reproduced as Karnataka State Law University set them, in the order it set them. Long reading passages are shortened to their first and last lines and our summary; the original paper prints them in full. Only the answers are ours. See the original question paper.
Duration 3 hours · Total marks 100 · 13 questions answered
How to use this volume
Solve the paper first, under exam conditions and against the clock. Then read the answers here and mark your own. Reading a solution before attempting the question feels productive and teaches very little, because recognising an answer is not the same as being able to write one.
Q1Explain the methods of calculation and difficulties in estimation of National Income.[16]
Answer
For full marks, cover: what national income is and why output, income and spending must be equal; the three methods of calculation (product or value added, income, expenditure), each with its steps, what is included and excluded, and its weak point; one worked example that measures the same economy all three ways; how India combines the methods; the difficulties in estimation, conceptual and practical, with the special problems of India; how the difficulties are reduced; and a conclusion.
Meaning
National income is the money value of all final goods and services produced by a country's residents in a year, after allowing for depreciation. Every rupee of output sold is a rupee of spending by the buyer and a rupee of income for those who produced it. So national income can be measured at three points in the circular flow. These are where goods are produced, where incomes are earned, and where output is spent. In principle the three totals are equal.
A. Methods of calculation
1. The product or value added method. National income is found by adding the value added by every producer.
Steps:
- Divide the economy into sectors: primary (farming, forestry, fishing, mining), secondary (manufacturing, construction, electricity) and tertiary (trade, transport, finance, public services).
- For each producer, find the value of output and subtract the value of the materials and services bought from other producers. The difference is its gross value added.
- Add the value added of all sectors to get GDP.
- Deduct depreciation and add net factor income from abroad to reach national income.
What to watch. Only value added is counted, never the full sales of every stage, or the same goods would be counted again and again. Output kept for the producer's own use, such as grain a farmer eats, must be valued and included.
2. The income method. National income is found by adding all factor incomes earned in producing the year's output.
What is included:
- compensation of employees: wages, salaries, and employers' contributions for pensions and insurance;
- rent for the use of land and buildings, including the imputed rent of houses lived in by their owners;
- interest earned on capital lent for production;
- profits of companies, whether paid out or retained;
- mixed income of the self-employed, such as small shopkeepers and farmers, whose earnings are part wage and part profit.
What is excluded: transfer payments such as pensions and scholarships, capital gains from the sale of shares or land, and gifts and lottery prizes. None of these pays for current output.
3. The expenditure method. National income is found by adding all final spending on the year's output:
GDP = C + I + G + (X minus M)
- C, private final consumption by households;
- I, gross investment in new capital goods and stocks;
- G, government final consumption;
- X minus M, net exports.
What is excluded:
- purchases of second-hand goods, which were counted when first made;
- purchases of shares and bonds, which only transfer ownership;
- intermediate goods, which are already in the value of final goods.
B. One economy, three methods
A cotton grower sells cotton for 200 rupees. A spinner turns it into yarn sold for 500. A weaver makes cloth sold for 900. A tailor makes shirts sold to households for 1,300.
| Stage | Sales | Bought from others | Value added |
|---|---|---|---|
| Cotton grower | 200 | 0 | 200 |
| Spinner | 500 | 200 | 300 |
| Weaver | 900 | 500 | 400 |
| Tailor | 1,300 | 900 | 400 |
| Total | 2,900 | 1,300 |
- Product method: value added is 200 + 300 + 400 + 400 = 1,300. Adding all sales, 2,900, would count the cotton four times.
- Income method: suppose wages are 700, rent 100, interest 150 and profits 350. Total income is 1,300.
- Expenditure method: households spend 1,300 on shirts, the only final good. Total spending is 1,300.
All three give the same answer, because they look at one flow from three sides.
The three methods compared
| Method | Best suited to | Weak point |
|---|---|---|
| Product | Farming, mining, manufacturing, where output can be counted | Risk of double counting |
| Income | Services and government, where incomes are recorded | Incomes of the self-employed are hard to trace |
| Expenditure | Showing the pattern of demand | Spending of households is hard to measure |
No method is complete on its own. Each fills gaps in the others.
C. How India combines the methods
The first estimates of India's national income were made by Dadabhai Naoroji, and later by V. K. R. V. Rao. After independence the National Income Committee of 1949, under P. C. Mahalanobis, produced the first official estimates. The work is now done by the National Statistics Office.
India's National Statistics Office uses the product method where output can be counted, as in agriculture, mining and manufacturing. It uses the income method where it cannot, as in public administration, banking and other services. The expenditure method gives GDP by type of demand and serves as a cross-check. The new series released on 27 February 2026, with base year 2022-23, draws on new sources including GST records. It also uses double deflation in agriculture and manufacturing, which deflates output and inputs separately.
D. Difficulties in estimation
(a) Conceptual difficulties
- Final or intermediate? The same good can be either. Coal burnt in a factory is intermediate, while coal burnt at home is final. Wrong treatment leads to double counting or omission.
- Unpaid work. Cooking, cleaning and caring for children at home produce real services but are not sold. A. C. Pigou pointed out the paradox: "if a man marries his housekeeper or his cook, the national dividend is diminished." The work is unchanged, but the wage disappears.
- Output for own use. Farmers eat part of their crop, and owners live in their own houses. Such output has no market price and must be imputed.
- Public services. Defence, police and courts are not sold. They are valued at what they cost, which may be more or less than their worth.
- Depreciation. The wear and tear of machines and buildings cannot be observed directly, so it must be estimated.
- Changing prices. Money values rise with inflation. To compare years, output must be valued at base-year prices, and the choice of base year affects the result.
- Illegal and hidden activity. Smuggling, bribes and undeclared sales add to incomes but are not reported.
(b) Practical difficulties, especially in India
- A large informal sector. Self-employment is about 55.8 per cent and casual labour 18.9 per cent of employment. Most small units keep no accounts, so their output is estimated from sample surveys.
- Non-monetised transactions. In villages some goods and services are still exchanged in kind.
- Several occupations at once. A farm worker may also work in construction or trade, so his or her income is hard to assign to one sector.
- Poor records and low reporting. Many earners do not keep accounts or understate incomes to avoid tax.
- Delays and revisions. First estimates rest on partial data and are revised later, sometimes by a large margin.
- Changes of base year. Each new series changes methods and sources, which makes long comparisons difficult.
E. How the difficulties are reduced
| Difficulty | How statisticians respond |
|---|---|
| Double counting | Count value added only |
| Output for own use | Impute a value at market prices |
| Informal sector | Sample surveys, now supported by GST and digital data |
| Difficulty | How statisticians respond |
|---|---|
| Public services | Value at cost |
| Rising prices | Use constant base-year prices |
| Errors in one method | Cross-check with the other two |
Conclusion. National income can be calculated by the product method, the income method or the expenditure method. All three work because output, income and spending are one flow seen from three sides. India uses a mix of all three, with a new 2022-23 base and GST data. Estimation is difficult because of double counting, unpaid and own-account work, public services, depreciation, price changes and hidden activity. In India a large informal sector adds to these. Careful definitions, surveys and cross-checks keep the errors within limits.
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