Ashok Mitra introduced a functional classification system for towns in India, drawing upon industrial categories from the 1971 Census of India. At that time, he held the position of Registrar General of the Census of India. Like Harris and Nelson, Mitra categorised Indian towns and cities based on their economic functions, and his approach is considered highly suitable for the Indian context due to its flexibility. He gauged the dominant economic function of a town by examining the proportion of its workforce engaged in industrial activities.
The 1971 Census of India identified nine major industries, classified as follows:
I. Cultivators
II. Agricultural Laborers
III. Livestock, fishing, forestry, hunting, plantation, and allied activities
IV. Mining and Quarrying
V. Manufacturing, including both household and non-household manufacturing
VI. Construction
VII. Trade and Commerce
VIII. Transport, Storage, and Communication
IX. Other Services
These categories were based on the Indian Standard Industrial Classification. However, Mitra excluded agricultural activities from his classification, deeming them primarily rural in nature. Consequently, his final classification of towns encompassed categories III through IX.
Mitra's Functional Classification Criteria for Towns:
According to Ashok Mitra, a town's character is defined by the dominance of its three major economic activities. He established the following criteria for classifying towns into the above three categories:
Manufacturing Town:
Industries falling under III, IV, V, and VI are part of the manufacturing sector, involving processes that add value to raw materials. A town is classified as a manufacturing town when the percentage of workers engaged in manufacturing activities surpasses that in other economic sectors. In such towns, manufacturing is the primary economic function.
Trade & Transport Town:
Economic activities categorised as VII and VIII are part of the trade and transport sector, playing a crucial role in the movement of raw materials, goods, labour, and services. A town qualifies as a trade and transport town when the proportion of workers in trade and transport activities exceeds that in other economic sectors. In such towns, trade and transport constitute the primary economic function.
Service Towns:
Economic activities designated as IX belong to the service sector, offering various skills, knowledge, and assistance to other sectors for their smooth operation. A town is categorised as a service town when the percentage of workers engaged in service activities surpasses that in other economic sectors.
Degree of specialisation
Ashok Mitra's perspective emphasised the multifunctionality of towns, recognizing that the level of specialisation or the predominant function could differ from one town to another. As a result, he argued against categorising each manufacturing or service town into a single category for the purpose of crafting development policies.
Instead, Mitra employed a Ternary Diagram to assess the extent of specialisation in a town's economic function. Once the broad functional classification of a particular town had been determined, the proportion of the town's most dominant economic function was plotted on the ternary diagram to gauge the degree of specialisation.
The term "Ternary diagram" (see figure) refers to a diagram that illustrates the percentage or proportion of three indicators along the three sides of a triangle. The percentage gradually increases from the midpoints of the sides (A, C, E) of the triangle toward the vertices (B, D, F).
In Ashok Mitra's functional classification of towns, this ternary diagram displays the percentage of workers engaged in manufacturing, trade & transport, and services along its three sides.
In this diagram, the blue, red, and yellow lines represent the percentages of workers. These percentages start at zero along the midpoints of the triangle at points A, C, and E and increase towards points B, D, and F. For instance, in the case of services, the percentage of workers begins at zero at point E and rises towards F, where it reaches 100%.
Furthermore, a smaller black triangle indicates the 50 percent threshold. When the line EF crosses this smaller triangle, it signifies that the percentage of workers in the service sector exceeds 50%.
Categories of Specialisation:
Mitra incorporated three circles drawn from the centre of the triangle, proportionally, to signify varying degrees of specialisation. When the percentage of workers in a dominant function is plotted on the ternary diagram, it results in the following categories of specialisation:
Diversified Towns: The centre point of the triangle corresponds to 35 percent. Any point falling within the purple circle denotes a diversification of economic activities.
Moderately Specialized: Towns falling between the purple and black circles indicate a moderate functional predominance.
Highly Specialised: Towns located between the black and green circle points suggest a high degree of functional predominance.
Very Highly Specialised: Finally, points located outside the green circle indicate a very high degree of specialisation.
Here is the list of the six zones of the triangle outside the 50% circle and the dominance of workers:
Relevance and Conclusion:
Ashok Mitra devised a highly pragmatic classification system for cities and towns in India. He recognized that Indian cities are multifunctional and cannot be neatly pigeonholed into specific categories. Therefore, he categorised them based on their most dominant economic function. Although there were no rigid criteria for qualifying for a particular functional category, this classification method organises broad categories into classes based on the degree of specialisation. Nevertheless, it does not account for the agricultural activities present in Indian cities, such as horticulture on the floodplains of the Yamuna River in Delhi. Despite this, the classification remains remarkably flexible and objective.
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