India's GDP debate: Right questions, wrong numbers, Pg13

Key Highlights:

• A Peterson Institute working paper questions the accuracy of India's GDP estimation, alleging systematic misestimation.
• The paper critiques the use of WPI-based deflators and formal-sector data as proxies for informal sector activity.
• Revisions to the national accounts methodology in February 2026 addressed some concerns, including deflator choices.
• The working paper's claims are contested based on data limitations, methodology, and structural changes in the Indian economy.

Detailed Insights:

• The paper's core complaints regarding deflator choices and informal sector representation have been present in academic literature since 2016.
• Using WPI as a deflator is conceptually similar to a Producer Price Index, which aligns with international recommendations.
• The paper's informal sector corrections exclude construction and housing services, understating informal sector performance.
• India's economy has undergone substantial changes since 2015, including the expansion of the digital economy and policy-driven formalization.
• The Economic Survey of India 2017-18 indicated that purely informal firms accounted for a small percentage of total economic turnover.
• The official February 2026 revision produced a more modest adjustment than the paper's estimates, challenging the extent of overestimation.

Key Concepts Involved:

• GDP (Gross Domestic Product): The total monetary or market value of all the finished goods and services produced within a country’s borders in a specific time period.
• WPI (Wholesale Price Index): An index that measures and tracks the changes in the price of goods at the wholesale level.
• Deflator: A measure of price inflation/deflation with respect to a base year.