Former Chief Statistician Pronab Sen recommends dual GDP series (old and new base) for minimum five years
GK and monthly revision
Former chief statistician Pronab Sen seeks two GDP series with old, new bases for five years
Former Chief Statistician Pronab Sen has advocated for maintaining two GDP series — one with the old base year and another with the new base — for at least five years to ensure data reliability. He emphasized that accurate double deflation requires extensive input and output price data, which is currently lacking. The controversy over India's new GDP series and its back series has raised concerns about growth figure credibility. The National Statistical Office (NSO) is expected to release the back series by December 2026, making this a critical topic for economic statistics and national income accounting in competitive exams.
Source: Economic Times. This summary and analysis are AI-written from that report and are not individually fact-checked — confirm names, dates and figures with the source before you rely on them.
Revision structure
Monthly events and exam calendar context
Static GK and one-liner notes
Quiz and mock-test revision path
Key points
Exam-ready takeaways
Accurate double deflation requires comprehensive input-output price data, currently insufficient in India
Controversy persists over new GDP series methodology and back series growth figures
National Statistical Office (NSO) expected to release back series data by December 2026
Issue critical for national income accounting, base year revision, and statistical credibility in Indian economy
How to study
Turn news into exam marks
Revise monthly events by exam family instead of reading random updates.
Pair one-liners with mock tests so mistakes become the next revision list.
Note which exams each story matters for, and revise it again in the week before that exam.