In recent weeks economists at Goldman Sachs, the World Bank and the imp have forecast India's economy will grow a bit faster than China's within a year or two. The day came sooner than they expected. Figures released on February 9th showed that India's GDP rose by 7.5% year on year in the fourth quarter of 2014, a shade faster than China's. The strength of China's economy is often disputed. Now it is India's turn to have its numbers questioned. The data were foreshadowed on January 30th when India's Central Statistics Office (CSO) released revised estimates of GDP as part of an exercise known as "re-basing". GDP is typically measured by reference to the prices and structure of the economy in a base year. Over time this snapshot becomes less relevant, and the GDP figures less accurate, so the base year is updated every few years. The cso changed India's from 2004-05 to 2011-12. On the new reckoning, GDP growth for 2013-14 was revised up from 4.7% to 6.9%.
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