Index of Industrial Production: Weights and Core Industries

The correct answer is B, the National Statistical Office. It works under the Ministry of Statistics and Programme Implementation, gathers production returns from more than a dozen source agencies spread across ministries, and publishes the IIP every month as a Quick Estimate that is revised as fuller data come in. Option A, the Department for Promotion of Industry and Internal Trade, is the wrong answer for the IIP but the right one for a related index, because its Office of the Economic Adviser compiles the Index of Eight Core Industries and the Wholesale Price Index; examiners rely on that overlap. Option C, the Reserve Bank of India, is a heavy user of the IIP in framing monetary policy but does not compile it. Option D, NITI Aayog, is a policy think tank and has no statistical production function of this kind at all.

The correct answer is D, Agriculture. The IIP is confined to the industrial sector and has exactly three components, mining, manufacturing and electricity, which are options A, B and C. Agriculture and the whole of the services sector, which together account for the larger part of India's output, lie outside the index, and that is why a rise in the IIP can never by itself be described as a rise in the growth of the economy. The point is tested in statement form, where a candidate is asked whether the IIP reflects overall economic activity; the answer is that it reflects industrial activity alone. Farm output is tracked instead through crop estimates and the advance estimates of agricultural production, and services through separate indicators, all of which are brought together only in the national accounts.

The correct answer is B, Manufacturing, which carries 77.63 per cent of the weight of the index. Mining, option A, has 14.37 per cent, and electricity, option C, has 7.99 per cent, so the three add up to a hundred. Because manufacturing dominates so heavily, the monthly headline number usually moves with factory output, and a bad month in mining or power can be offset entirely by a good month in factories. Option D, construction, is not a component of the IIP at all, which is the trap in this question; construction activity is reflected only indirectly through the infrastructure and construction goods category of the use-based classification, which measures the production of items such as cement and steel structures rather than building work itself. The weights come from the gross value added shares of the base year, 2011-12.

The correct answer is C, 2011-12. In 2017 the base year of the IIP was shifted to 2011-12, the item basket was refreshed to take in goods that had become important since the previous revision, and the weights were recalculated from the gross value added shares of that year. Option B, 2004-05, was the base of the series that the 2011-12 series replaced, and it is the answer a candidate gives who has memorised the older textbook. Option A, 1993-94, was an earlier base still, used before 2004-05, and it also served as the base year for several other Indian indices of that period. Option D, 2017-18, is only the year in which the revision was announced and has never been a base year for this index. A base year is chosen as a normal year, free of unusual disturbance, so that comparisons are meaningful.

The correct answer is C, about 40 per cent; the precise figure is 40.27 per cent. The eight core industries are the energy and basic material industries on which the rest of manufacturing depends, and because they make up two-fifths of the IIP their monthly index is read as an advance signal of what the fuller index will report a little later. Options A and B, 25 and 33 per cent, understate the share and are offered because candidates often confuse this figure with the share of manufacturing in gross value added or with the forest cover target of a third. Option D, 50 per cent, overstates it; no single group inside the IIP reaches half the weight except manufacturing as a whole, which stands at 77.63 per cent. Remembering the pair 40.27 for the core sector and 77.63 for manufacturing keeps the two apart.

The correct answer is B. The Office of the Economic Adviser, which sits in the Department for Promotion of Industry and Internal Trade under the Ministry of Commerce and Industry, compiles the Index of Eight Core Industries and also the Wholesale Price Index, and it publishes the core sector figure every month. Option A, the National Statistical Office, compiles the wider Index of Industrial Production and the Consumer Price Index, and the examiner's whole purpose in this question is to see whether a candidate can keep the two offices apart. Options C and D, the Ministry of Power and the Ministry of Coal, are source agencies that supply the production data for electricity and for coal respectively, but neither of them puts the eight series together into an index. Only one office does that, and it is not the one that produces the IIP.

The correct answer is C, Refinery products, with a weight of 28.04 per cent, more than a quarter of the whole index. Refining turns crude oil into petrol, diesel, kerosene, naphtha and feedstock for chemicals, and the value of that output is so large that a shutdown at a big refinery shows up in the national figure. Option A, electricity, comes next at 19.85 per cent, and option B, steel, follows at 17.92 per cent, so all three options are near the top and only their order distinguishes them. Option D, coal, carries 10.33 per cent and stands fourth. The full descending order worth memorising is refinery products, electricity, steel, coal, crude oil at 8.98, natural gas at 6.88, cement at 5.37 and fertilisers at 2.63 per cent, and the eight weights add up to a hundred.

The correct answer is A, Fertilisers, whose weight is only 2.63 per cent, the smallest of the eight. Fertiliser output is important for agriculture and is watched before every sowing season, but the value of the industry's production is small beside refining or steel, which is why its weight is light and a big percentage swing in fertilisers barely moves the combined index. Option B, cement, carries 5.37 per cent and is the second smallest. Option C, natural gas, carries 6.88 per cent, and option D, crude oil, carries 8.98 per cent, so the four options are exactly the bottom four of the list and the question is asking for their order. A useful check is that the three fossil fuel members, coal, crude oil and natural gas, all sit in the middle of the table, while the extremes are refining at the top and fertilisers at the bottom.

The correct answer is C, Textiles. The eight core industries are coal, crude oil, natural gas, refinery products, fertilisers, steel, cement and electricity, so options A, B and D are all on the list. Textiles is one of the largest employers in Indian manufacturing and has a substantial weight inside the manufacturing component of the IIP, but it is not a core industry, because the core list is confined to energy and basic materials that feed the rest of industry. The same trap is set with sugar, automobiles, chemicals and paper, none of which is a core industry either. A quick way to hold the list is to count three fuels, namely coal, crude oil and natural gas, one product of refining, two construction materials in steel and cement, one farm input in fertilisers, and electricity.

The correct answer is B, Primary goods, with a weight of 34.05 per cent. Primary goods in this classification are the output of mining, crude oil and natural gas extraction and electricity generation, that is goods that enter production before any manufacturing has been done to them, so the category naturally carries the largest share. Option D, intermediate goods, is second at 17.22 per cent, and covers items made to be used in further manufacture. Option C, consumer durables, carries 12.84 per cent and is watched as a measure of household confidence. Option A, capital goods, carries the smallest weight of the six at 8.22 per cent, yet it is the most discussed, because machinery and plant are ordered only when firms expect to expand, so a sustained rise there signals fresh investment. The remaining two categories are consumer non-durables at 15.33 and infrastructure and construction goods at 12.34 per cent.

The correct answer is B, a volume index of industrial output. The IIP compares the physical quantity of goods produced in a month with the quantity produced in the base year, taking a weighted average of those quantity relatives, so it rises only when more is actually made and is untouched by a change in prices. Option A describes an altogether different family of numbers, the Wholesale Price Index and the Consumer Price Index, which measure prices and are used to calculate inflation. Option C is wrong because employment in industry is measured by labour force surveys and by the quarterly employment survey, not by the IIP. Option D is wrong because company profits are reported in financial results and captured in corporate data, and a firm can earn more on the same volume simply because prices rose. Keeping the IIP on the quantity side and the price indices on the value side is the distinction examiners test.

The correct answer is B, a revival of investment activity. Capital goods are machines, plant and equipment that are bought not to be consumed but to produce other goods, and a firm orders them only when it expects demand to grow enough to justify adding capacity. A run of good capital goods numbers therefore tells economists that businesses are investing again, which is why the category is quoted far more often than its small weight of 8.22 per cent would suggest. Option A belongs to consumer non-durables, which track everyday consumption. Option C is wrong because export competitiveness is judged from trade data and exchange rates, not from a domestic volume index. Option D is wrong on principle, since the IIP measures quantities and carries no price information at all, so no movement in it can by itself indicate inflation.