Methods of calculating national income - Value Added/Product Method

The total value of output is 900 because it includes both sales of 700 and the increase in inventories of 200: output = 700 + 200 = 900. Value added is the value of output minus the value of intermediate consumption. Thus, value added = 900 − 400 = 500. The sales figure alone, 700, is not the complete output figure because the unsold production added to stock is also current production and must be included.

A decrease in stock means that current sales exceed current production, because some goods sold were taken from previously accumulated inventory. Therefore, current output is sales minus the stock decrease: 1,000 − 150 = 850. Value added equals output minus intermediate consumption, so it is 850 − 500 = 350. Adding the stock decrease would incorrectly treat withdrawals from old inventory as current production and would give the wrong result of 650 or 1,150 depending on the calculation.

Under the value-added or product method, the value added by all producing units is added to measure total domestic product. Therefore, total value added = 100 + 150 + 250 = 500. This method avoids double counting because only the additional value created by each firm is included, rather than the full value of all intermediate transactions.

Domestic product measured by the product method is obtained by adding the value added generated by all domestic sectors. Here, domestic product = value added of primary sector + secondary sector + tertiary sector = 800 + 1,200 + 1,500 = 3,500. Thus, option C is correct, assuming the figures are measured on the same basis.

Classifying production into primary, secondary and tertiary sectors helps economists identify the contribution of each sector and then add its value added systematically. It also improves the organization and checking of national-income estimates. The purpose is not to hide taxes or count intermediate goods again, because that would distort output through double counting.

Services such as transport, banking, education and communication are part of domestic economic production when they are produced during the accounting period. Therefore, an increase in the service sector’s value added generally raises domestic product, provided other components do not fall enough to offset it. The word “may” allows for such possible offsetting changes.

A good purchased and used as an input for producing another good or service is an intermediate good. Its value is not counted separately as final output because it is already embodied in the value of the final product. Including both the intermediate input and the final product would count the same production more than once.

A good purchased for final consumption or investment is a final good because it is not being bought for further processing into another product during the accounting period. Its value is included in final output. Investment goods such as newly purchased machinery are also final goods, even though they help produce goods in future years.

Raw material that has been purchased but remains unused is held as inventory or stock of the firm. It is not final consumption because the firm has bought it as a production input, and it is not yet intermediate consumption until it is actually used in production. Recording it as stock prevents the measurement of current output from being distorted.

An increase in stock means that some goods produced during the current period remain unsold at the end of that period. These goods are still part of current production, even though they have not yet generated sales revenue. If the increase in inventory is omitted, current output will be recorded below its true value; therefore, output is underestimated.

When stock decreases, some goods sold during the current period may have been produced in an earlier period. Therefore, current sales can exceed current production. The decrease in stock must be subtracted to obtain the correct value of current output. If it is ignored, earlier production is wrongly treated as current production and output is overestimated.

Depreciation, also called consumption of fixed capital, represents the loss in value of machines, buildings and other fixed capital assets caused by normal wear and tear or obsolescence during production. It is subtracted from gross product to obtain net product. This ensures that net output reflects the value created after replacing the capital used up.

Value added is the additional value created by a firm after subtracting the cost of intermediate inputs from the value of its output. This newly created value becomes income for the factors of production: wages for labour, rent for land, interest for capital, and profit for the entrepreneur. Therefore, the product method and income method are closely connected.

In a production chain, the output sold by one firm may be purchased as an intermediate input by another firm. If the sales of both firms are added, the same value is included more than once. National income therefore uses total value added or counts only final goods to avoid double counting.

At each stage of production, value added equals the value of output minus the value of intermediate inputs. When value added is calculated for every stage, the intermediate transactions cancel out in the chain, leaving the value of the final product. Thus, a total of 1,000 can equal the final-goods value of 1,000 without implying that intermediate consumption is zero.

The reliable procedure begins by finding the value of output and subtracting intermediate consumption to obtain gross value added. After that, the required national-income adjustments must be applied: subtract depreciation to move from gross to net, and adjust market-price measures for net indirect taxes when factor-cost income is required. The exact adjustments depend on the aggregate requested.

Under the value-added method, gross value added equals the value of output minus intermediate consumption: ₹90,000 − ₹35,000 = ₹55,000. Net value added is obtained by subtracting consumption of fixed capital, or depreciation, from gross value added: ₹55,000 − ₹5,000 = ₹50,000. Therefore, option A is correct. Depreciation must be deducted because the question asks for net, not gross, value added.

Gross value added measures the new value created by a producing unit. It is calculated as the value of output minus the value of intermediate consumption used up during production. This prevents the value of raw materials and other purchased inputs from being counted again in the final product. Profit is only one component of value added, so total sales minus profit is not the correct formula. Hence, option B is correct.

The value of output is calculated as sales plus closing stock minus opening stock. Here, ₹2,00,000 + ₹35,000 − ₹20,000 = ₹2,15,000. The stock increased by ₹15,000, meaning that production exceeded the amount sold during the period. Therefore, option C is correct. Ignoring the change in stock would incorrectly equate sales with output.

Intermediate consumption consists of goods and services that are used up as inputs during the current production process. Raw material, such as cotton used by a textile unit or steel used by a machine producer, is consumed in making another product and is therefore included. A new machine is a capital good, wages are factor payments, and profit is a return to the owner. Thus, option C is correct.

To convert GVA at market price into GVA at factor cost, subtract net indirect taxes. Net indirect taxes equal indirect taxes minus subsidies: ₹20,000 − ₹8,000 = ₹12,000. Therefore, GVA at factor cost is ₹1,50,000 − ₹12,000 = ₹1,38,000. Option A is correct. Subsidies reduce the net tax burden, so they are subtracted from taxes before adjustment.

Double counting occurs when the value of intermediate goods is added separately to the value of final goods. The value of intermediate inputs, such as flour used in bread, is already embodied in the price of the final product. Counting both the flour and the bread would count the same economic value more than once and overstate national income. Therefore, option B is correct. Counting only final goods is a method used to avoid this problem.

Value added is calculated by subtracting the cost of intermediate inputs from the value of output at each stage. The farmer adds ₹10,000, the mill adds ₹18,000 − ₹10,000 = ₹8,000, and the bakery adds ₹30,000 − ₹18,000 = ₹12,000. Total value added is ₹10,000 + ₹8,000 + ₹12,000 = ₹30,000, equal to the value of the final bread. Adding all sale values would double-count intermediate transactions.

Goods produced for self-consumption are included in national income because they represent current production, even though no market sale takes place. Their value is estimated using the prevailing market price of a similar good, or another reasonable valuation method. This imputed value records the economic contribution of the producer and prevents national output from being understated merely because the product was consumed by its producer.

The production boundary includes goods and services produced for sale or supplied through a market-related transaction. The housing service of a rented house has an observable rental value and is therefore included in measured output. In contrast, routine household services performed by family members for themselves, such as cooking, cleaning, or informally teaching a friend, are generally excluded because they do not have a recorded market transaction.