The challenge of identifying economic activities of firms

  • Blog Post Date 23 August, 2018
  • Perspectives
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Radhika Pandey

National Institute of Public Finance and Policy

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Amey Sapre

National Institute of Public Finance and Policy

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Pramod Sinha

National Institute of Public Finance and Policy

The reliability of India’s GDP estimates has been debated extensively. A key challenge in the construction of macro-aggregates lies in the proper identification of firms’ economic activities as firms can have multiple activities across industries. In this post, Radhika Pandey, Amey Sapre, and Pramod Sinha demonstrate the extent of the identification problem, which is a major challenge in the estimation of value addition in the manufacturing sector.

One of the major challenges in constructing macro-aggregates such as Gross Value Addition (GVA) is the proper identification of economic activities of firms. The challenge emerges because firms can have multiple activities and even diversify across industries as part of their business strategy. In such cases, identification of a firm's primary activity becomes a prerequisite for computing value addition in a given sector such as manufacturing or services. Without proper identification, the outcome of any estimation exercise can have several inaccuracies, such as: (i) incorrect inclusion/exclusion of firms in a sector, (ii) distortion in industry-level GVA estimates, and (iii) incorrect diagnosis and policy formulation for industries.

To be specific, how is identification of economic activities of firms a problem in the Indian case? In the 2011-12 series of the National Accounts the GVA estimates of ‘Private Corporate Sector’ — that is, the organised part of manufacturing and services — are computed using the MCA211 dataset. The current identification of economic activities of firms rests on information from reported ITC-HS product codes3 wherever available, the MGT-9 form3 submitted along with annual financial statements, checking websites of firms in absence of product information and finally, using NIC (National Industrial Classification) codes contained in the CIN (corporate identification number) of the firm (Central Statistics Office (CSO), 2015). The issues with such an identification strategy are well known; (i) ITC-HS involves product codes and does not capture the economic activities of the firm, (ii) CIN captures the firm’s economic activities in its year of incorporation, which may be different from the firm’s current operations.

A host of issues relating to the identification problem have been a part of the debate on the 2011-12 series, particularly on the manufacturing sector. In this post, we take the debate further by highlighting the extent of the identification problem, which is a major challenge in GVA estimation.

The extent of the identification problem

At present, the MCA21 dataset is not available in the public domain. We use a comparable dataset from CMIE (Centre for Monitoring Indian Economy) Prowess to analyse data on nearly 48,000 listed/unlisted private and public limited firms spanning over 30 years (1988-2018). Identifying changes in primary economic activity is a two-step process. The first step is a scrutiny of product schedules and the corresponding sources of revenue of the firm. Second, within available activities, primary activity is widely accepted to be the one with the maximum revenue contribution. The question is: how frequently does primary activity change? Since businesses can change their primary activity in any year, we begin by arranging firms as per the number of years for which data is available.

Table 1 shows the number of times primary activity changed for firms with different years of data availability. For firms with one year of data, the primary activity is their current activity and hence shows no change. Next, out of 4,319 firms with two years of data, 228 firms showed a change as compared to their previous year's activity. Similarly, in case of firms with four years of data, 566 show a change once, while 32 firms changed primary activity twice. As we move down on the number of years, changes become more frequent and the extent of the problem appears clearly. In columns D and E we add the number of firms with changes in primary activity (that is, excluding no change) for each year and compute their share in the total number of firms to get a sense of the magnitude.

Table 1. Changes in primary economic activity of firms over time

Data available (No. of yrs.)

Changes in primary economic activity (No. of firms)

Total At least one change % Share (D/E) Cumulative (Col. D)


0 1 2 3 4
1 937 0 0 0 0 937 0 0% 0
2 4,091 228 0 0 0 4,319 228 5% 228
3 3,323 451 16 0 0 3,790 467 12% 695
4 2,639 566 32 0 0 3,237 598 18% 1,293
5 3,442 795 57 1 0 4,295 853 20% 2,146
6 2,516 826 63 0 0 3,405 889 26% 3,035
7 2,131 770 78 6 0 2,985 854 29% 3,889
8 1,897 815 94 5 0 2,811 914 33% 4,803
9 1,807 844 129 3 0 2,783 976 35% 5,779
10 1,661 846 143 16 0 2,666 1,005 38% 6,784
11 1,411 779 106 12 0 2,308 897 39% 7,681
12 1,380 704 113 6 0 2,203 823 37% 8,504
13 1,039 627 144 8 0 1,818 779 43% 9,283
14 1,044 574 109 10 1 1,738 694 40% 9,977
15 771 451 96 14 0 1,332 561 42% 10,538
>15 4,648 2,501 750 98 2 7,999 3,351 42% 13,889
Total 34,737 11,777 1,930 179 3 48,626 13,889 29% --

Source: Computed using firm-level data from CMIE Prowess.

The numbers reveal some interesting aspects of firms' businesses: (i) over time, firms are frequent in changing their business activities and such changes are not apparent in an aggregate GVA estimate for any year; (ii) sources of revenue keep changing, which, from a data point of view, implies a change in the primary business of the firm; (iii) with a longer time span, the possibility of a large number of firms having repeatedly changed their primary activity increases. If we consider the simplest case, Figure 1 plots the share of firms that have changed their primary activity at least once over the years.

Figure 1.Percentage share of firms with at least one change in primary activity

The percentage of firms that show a change increases substantially once we have a longer time span. For example, for firms that have eight years of data available, 33% have changed their activity at least once. To delve deeper at the industry level, we explore firms that have at least 10 years of data and changed their primary activity at least once.

Table 2. Changes in economic activities across industries

Current industry changed to
Previous Industry Constr. Electricity Fin. Serv. Manuf. Mining Non-fin. Serv. Total
Constr. 23 0 28 9 0 15 75
Electricity 1 7 7 3 0 1 19
Fin. Serv. 25 4 61 23 2 86 201
Manufacturing 7 2 45 79 2 133 268
Mining 0 0 2 1 2 5 10
Non-Fin. Serv. 15 2 97 89 2 68 273
Total 71 15 240 204 8 308 846

Note: Constr. Is Construction; Fin. Serv. Financial Services; Manuf. is manufacturing; Non-Fin. Serv. is Non-Financial Services.

Source: Computed using firm-level data from CMIE Prowess.

As an illustrative case, out of the 268 firms in manufacturing, 133 moved to non-financial services, while 89 moved from non-financial services into manufacturing at least once in the past 10 years. Over the years, it is possible for firms to move in and out of an activity or return to their original activity after having ventured into multiple industries. If we were to include multiple changes, the task becomes unmanageable as it is difficult to track the economic activities of a firm from its historic data.

Why is identification of economic activities of firms a concern?

Changing economic activities at the firm level is a reality and the impact of such changes on GVA estimation cannot be assumed to be negligible. Firms of different sizes move in and out of an industry, which makes it difficult to have an error-free list of firms that currently are and have always been in one economic activity. The criterion of maximum revenue contribution also has its own limitations. For example, if changes in revenue sources are frequent, the entire enterprise is likely to either get included or excluded from year-on-year estimation at the industry level. This process can lead to abrupt changes in levels and growth rates of value addition. Identification is also a challenge in case of entry and exit of firms. If firms are frequent in changing their industry, it complicates matters to know the number of registered and active firms in any industry. In reality, the MCA21 dataset, which is used for estimation purposes, has nearly 1 million firms spread over 10 years. The extent of changes in primary activity of large and small firms available in the dataset is presently unknown. Even if 1/3rd of the firms are likely to have changed their primary activity, the extent of misclassification can be substantial.


Identification of economic activities is among the finer aspects of measurement and accuracy of macro-aggregates. The case of the manufacturing sector is no different. Identifying primary activity of firms remains a challenge and may well require new systemic thinking in addition to current efforts and practices. Since identification of activities is a recurring or a year-on-year challenge, the process of identification must also be undertaken on a regular basis. Historic data of firms can reveal changes in primary activity, but the task of deciphering information from a large dataset like the MCA21 can be challenging. Given the debate on the reliability of GDP (Gross Domestic Product) estimates, perhaps the need of the hour is to focus on resolving challenges that affect the quality of our macro-aggregates and to keep pace with changing data and systemic environments.


  1. MCA21 Mission Mode Project is an e-governance initiative of the Ministry of Corporate Affairs (MCA), Government of India. Under the initiative, an electronic portal was launched for firms to file their annual financial statements.
  2. ITC-HS (Indian Trade Classification – Harmonised System) is an 8-digit coding system used for identifying products in trade and import-export operations.
  3. MGT-9 form was introduced pursuant to Sec. 92(3) of the Companies Act, 2013 that requires firms to provide up to three main products and services along with their percentage contribution to the total turnover.

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