In the next four decades, India & China are expected to have 35% of total GDP
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According to a study conducted by Japan Centre of Economic Research, the combined share of India and China's GDP would be nearly 35% of the total GDP. Wherein, India would account for 15% GDP and China for 20%. Resultantly, it would be quite near to American and European countries. China is expected to be ahead of United States by 2030. The study also indicates that the economy of US and Europe would eventually fall.