New Delhi, Sept. 7 -- India's growth outlook could face greater scrutiny in the coming quarters as concerns over the credibility and comparability of official GDP estimates complicate the assessment of underlying economic momentum, according to a research report by Systematix.

The brokerage said policymakers, investors and rating agencies may need to place greater emphasis on transparent data and alternative indicators until a comparable historical GDP series and greater clarity on the deflator methodology are available.

Systematix Research said the headline 7.8 per cent real GDP growth in Q1FY27 may overstate the underlying pace of expansion, pointing to the unusually low 2.5 per cent GDP deflator used to convert nominal growth into re...