Why did Kolkata’s industries decline after Indian independence in 1947?

Kolkata’s industries have experienced a general decline since India’s independence in 1947 due to several interconnected factors:

• Loss of Hinterland: The partition of Bengal in 1947 separated Kolkata from a significant portion of its former hinterland, which became East Pakistan (now Bangladesh). This loss severely disrupted trade and resource access.12
• Refugee Crisis: The influx of millions of refugees from East Pakistan placed an immense burden on the city’s administration, aggravating social problems and overcrowding.23
• Industrial Stagnation: The city suffered from an overall decline in industrial productivity and a notable lack of industrial diversification. Economic stagnation in the mid-1960s further fueled a flight of capital from the city.12
• Labor and Management Issues: Militant trade unions often slowed the introduction of new technology and deterred investment and entrepreneurial activity. Additionally, labor difficulties contributed to the decline of the city's port, which lost its position as India’s preeminent cargo handler in the 1960s.24

While large-scale manufacturing was eventually replaced by service-sector and small-scale firms in the 1990s, these historical challenges fundamentally reshaped the city's economic landscape.2