Examine the institutional and data-infrastructure challenges in transitioning India's national accounts to double deflation. What reforms are needed in India's statistical system?

Double deflation deflates an industry's gross output and its intermediate inputs by separate price indices to derive real GVA. MoSPI's new series with base year 2022-23 has adopted it across sectors, ending single deflation [1] — a methodologically superior shift whose credibility now rests on data and institutional readiness.

Data-infrastructure challenges

• Deflator gap: the old series used the Wholesale Price Index for both inputs and outputs; double deflation needs granular, sector-specific input and output price indices. India's Output PPI, trial Input PPI and Services PPI were released only in June 2026 [3], so consistent long series are still thin.
• Services coverage: the new Services PPI spans just seven services — banking, insurance, securities, pension funds, railways, air passenger and telecom [3] — leaving much of the largest sector without true producer prices.
• Informal sector: input–output structures of unincorporated enterprises are weakly captured; the IMF has stressed regular use of the annual survey of the unincorporated sector and greater reliance on producer prices [4].
• Error amplification: real GVA emerges as a difference between two large deflated aggregates, so dated input-output ratios magnify small deflator errors.

Institutional challenges

• Comparability: the recalculated back series is expected only by December 2026 [2]; till then old and new growth rates cannot be compared, fuelling disputes over past overestimation.
• Credibility: sizeable revisions between provisional and revised estimates, and open disagreement between serving policy bodies and former statistical officials, strain trust in official data.
• Coordination: deflators rest with DPIIT, accounts with MoSPI, surveys with NSO — transition demands joint sequencing.

Reforms needed

• Expand PPI to full goods and services coverage; institutionalise periodic base-year and benchmark revisions as international best practice [4].
• Release the back series on schedule with published methodology notes and FAQs [2].
• Strengthen the National Statistical Commission — set up on the Rangarajan Commission's recommendation [5] — with statutory backing and fixed release calendars.

Double deflation moves India towards global standards; its gains will materialise only if price statistics, survey frequency and institutional autonomy advance together. A credible, transparent statistical system is public infrastructure for evidence-based governance.