The Deflator Argument: Why 7.8 Per Cent Is Being Contested

The Lift Line

The ministry may well be right. It has not published the thing that would let anyone check.

Why This Editorial Matters for Your Exam

Deflators are the most reliably misunderstood item in GS3, and this column is the clearest available worked example of why they matter. It also demonstrates a mode of argument worth imitating: conceding the opponent’s technical case in full, then showing that the concession does not resolve the dispute. That structure earns marks in a “critically examine” question far more reliably than one-sided assertion.

GS Paper 3: Indian economy and issues relating to planning, mobilisation of resources, growth and development; government budgeting; inclusive growth. GS Paper 2: Statutory, regulatory and quasi-judicial bodies; transparency and accountability.

Background and Context

The dispute began when Subhash Garg, a former Finance Secretary, asserted that the Ministry of Statistics and Programme Implementation (MoSPI), headed by Saurabh Garg, had overstated growth by the expedient of reducing the previous year’s output. MoSPI replied that the comparison was apples to oranges.

Who is arguing here. The column is by Rahul Anand of the Madras Institute for Development Studies, Josh Felman of JH Consulting and Arvind Subramanian, a former Chief Economic Adviser to the Government of India. It offers a five-part assessment rather than a verdict, and the first part concedes the ministry’s case.

The Analysis

1. On the technicalities, the ministry is granted the point. The critic compared 2026-27 numbers computed on the new base and methodology against 2025-26 numbers computed on the old ones. Applied consistently, the new methodology yields 7.8 per cent real growth for both. The authors also concede the deflator point in full: value-added deflators can rise less than the CPI or WPI, and can even be negative, though rarely, when input prices rise sharply relative to output prices.

2. Some independent indicators support a good quarter. Real sales growth of listed firms at 14.9 per cent, real non-food credit growth at 14.9 per cent, and real export growth at 12.1 per cent. An honest answer records these before disputing the headline.

3. The trust deficit is the column’s central claim, and it is historical rather than technical. The authors trace scepticism to 2016-17, when official data showed growth accelerating to 8.2 per cent in a year in which 86 per cent of cash was withdrawn from circulation. They add a list: the Census delayed, the 2017 consumption survey withdrawn, Covid deaths seriously understated, and exaggerated claims on open defecation. Their formulation is worth memorising: the public has replaced “trust but verify” with “doubt but remain open”, and the burden of proof has passed to the government.

4. Three specific unanswered questions. Why was first-quarter 2025-26 GDP revised down by 7 per cent when the methodology changed? Why has no long back series been released? Why has the customary expert committee to construct one not even been announced? These are procedural failures, and each is independently remediable.

5. The coverage problem is the strongest technical objection. Unlisted firms and the informal economy together account for nearly 45 per cent of the economy. MoSPI has historically assumed they perform about as well as large listed companies. The authors, citing their Peterson Institute for International Economics working paper, argue that assumption has not held over the past decade, and would be least reliable in a quarter when an energy shock disproportionately hit smaller enterprises.

6. The reality check. April and May 2026 were months of shortages: fuel rationing, curtailed travel, restaurants buying LPG cylinders on the black market or shutting. Wage growth was tepid, job creation poor, the stock market sagging and the currency under pressure. The authors quantify the shock as equivalent to a tax increase of about 1.5 per cent of GDP, following a 32 per cent rise in energy import prices, and note the Reserve Bank had recently estimated that the economy slowed in the quarter. Against that background MoSPI reports growth accelerating by almost a percentage point year on year.

The precision that earns marks. Nominal GDP measures output at current prices; real GDP at constant prices. The implicit deflator is their ratio, and a lower deflator produces a higher real growth number from the same nominal figure. That is the entire mechanism of this controversy. A candidate who can state it in one sentence has understood the dispute; one who writes only that “growth figures are debated” has not.

Data and Institutions Vault

Prelims-grade facts:

The dispute:

• Former Finance Secretary Subhash Garg alleged that growth was overstated by reducing the previous year’s output.
• The Ministry of Statistics and Programme Implementation is headed by Saurabh Garg.
• Applying the new methodology consistently to both years yields real growth of 7.8 per cent.
• First-quarter 2025-26 GDP was revised down by 7 per cent when the methodology changed.
• No long back series on the new methodology has been released, and no committee to construct one has been announced.

The supporting indicators:

• Real sales growth of listed firms: 14.9 per cent.
• Real non-food credit growth: 14.9 per cent.
• Real export growth: 12.1 per cent.

The contrary evidence:

• Unlisted firms and the informal economy together account for nearly 45 per cent of the economy.
• The energy shock is estimated as equivalent to a tax increase of about 1.5 per cent of GDP.
• Energy import prices rose about 32 per cent.
• The Reserve Bank of India recently estimated that the economy slowed in the first quarter.
• Nominal net GST revenue grew about 5 per cent, even allowing for the GST rate cuts.
• Import volumes fell, and the manufacturing deflator was negative while central bank data showed business margins improving.

The statistical system:

• The GDP deflator is the ratio of nominal to real GDP and is an implicit rather than a fixed-basket index.
• Single deflation applies one price index to output and inputs; double deflation applies separate indices to each.
• GDP at market prices equals gross value added at basic prices plus product taxes minus product subsidies.
• The base year of the national accounts series determines the constant prices used for real estimates.
• The National Statistical Office was formed by merging the Central Statistics Office and the National Sample Survey Office in 2019.
• The National Statistical Commission was set up in 2005 on the recommendation of the Rangarajan Commission and is non-statutory.
• The Sources and Methods document is the handbook explaining how national accounts are compiled and revised.

⚠️ Watch the trap: A negative deflator is not automatically evidence of manipulation. It is possible, and occasionally correct, when input prices rise faster than output prices, which squeezes value added in price terms. The authors concede this explicitly. The examinable objection is not that a negative deflator is impossible but that its coincidence with improving margins requires explanation.

The Debate

The ministry’s case. A base revision necessarily changes earlier levels; that is arithmetic, not manipulation. The deflator behaviour complained of is a documented feature of value-added measurement. And the government’s coincident indicators are precisely the independent corroboration critics ordinarily demand. Asking an agency to disprove an insinuation inverts the ordinary standard of evidence.

The critics’ case. None of that is disputed. The objection is that the ministry has withheld the material that would let outsiders verify the claim: the methodology document, the back series, and an economic account of how output accelerated through a 32 per cent energy price shock. Where verification is impossible, technical correctness is unfalsifiable rather than established.

The reconciliation. These positions do not actually conflict, and saying so is the strongest available answer. The ministry may be right on every technical point and the credibility problem may still be entirely real, because credibility is a function of what can be checked rather than of what is true. The remedy is publication, and it costs the ministry nothing if its numbers are sound.

How to Think About This

When a measurement is disputed, separate three questions that commentary merges. Is the method defensible? Is the method applied consistently? Can an outsider reproduce the result? A number can pass the first two and fail the third, and a number that fails the third will be disbelieved however good it is. The authors’ closing device, that what is sauce for the goose today is sauce for the gander over the past, makes the point precisely: indicators cited to validate one quarter must also be applied to the years in which those indicators were weaker.

Diagram-in-Words

Takeaway Box

• Real growth equals nominal growth adjusted by a deflator. Lower the deflator and real growth rises. State the mechanism, not the controversy.
• The critics concede the technicalities. The argument is about publication: the back series, the Sources and Methods document, the missing committee.
• Forty-five per cent of the economy is unlisted or informal, and quarterly estimates extrapolate it from listed-company indicators.
• A 32 per cent energy import price rise, worth about 1.5 per cent of GDP, sits against a reported acceleration of almost a percentage point.
• Three puzzles are the quotable core: GST revenue up only about 5 per cent, import volumes down, manufacturing deflator negative while margins improved.

Sources: The Indian Express

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