Jawaharlal Nehru, the first prime minister of India, along with the statistician Prasanta Chandra Mahalanobis, formulated
the first statistical model of India. The model was based on the assumption that the population of India was divided into four major regions: North, South, East and West. The model was based on the assumption that the population of India was divided into four major regions: North, South, East and West.

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