"I am puzzled as I said because the fact that...Especially what happened in 2013-14, that number is puzzling because that is a kind of bad year, yet growth accelerated," Subramanian said.
He was replying to a query on he thinks there is a case to revisit the new methodology for measuring Gross Domestic Product( GDP).
"The balance of evidence shows that India is still a recovering economy not a surging economy," the Chief Economic Adviser added.
A change in base year for computing national accounts last month has pushed up the economic growth rate for 2013-14 to 6.9 per cent. The earlier estimate of GDP growth for India for 2013-14 based on the basis of old series was 4.7 per cent.
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These changes follow a revision in the base for calculating national accounts to 2011-12 from 2004-05.
The base year was last revised in January 2010.
The CEA, however, added that the improvement in data and methods put India on par with international standards of GDP estimation.