"India Shifts to PPI and Double Deflation for GDP Measurement"
Nominal GDP
GDP measured at current market prices, not adjusted for inflation.
Real GDP
GDP measured at constant base-year prices, removing the effect of inflation.
India's national income statistics are compiled by the Ministry of Statistics and Programme Implementation (MoSPI). The central concept is Gross Domestic Product (GDP), which is the sum of Gross Value Added (GVA) across all sectors plus indirect taxes minus subsidies. GVA itself is the difference between the value of a sector's output and the raw materials (inputs) it consumes.
Because prices change over time, economists distinguish between nominal GDP (measured at current prices) and real GDP (measured at constant prices). Converting nominal to real GDP requires removing the effect of inflation, a process called deflation. The choice of deflator and deflation method directly determines whether measured real growth is accurate or distorted.
India periodically revises its GDP series by changing the base year, the reference year against which constant prices are set. The previous base year was 2011-12. In February 2026, MoSPI released a new series with 2022-23 as the base year, accompanied by significant methodological changes.
Quarterly GDP estimates in India use a benchmark-indicator approach. High-frequency indicators, such as crop production, cement output, finished steel consumption, and commercial vehicle sales, guide the movement of quarterly estimates. As more actual data arrives (from company financial results and MoSPI surveys), these estimates are revised upward or downward. This is why a quarterly figure released initially can change substantially in later releases.
The key methodological change in the 2022-23 series concerns how real GVA is calculated. Under the old approach, a single price index was applied to both inputs and outputs of a sector to strip out inflation. This is called single deflation. The same index, whether the Consumer Price Index (CPI), the Wholesale Price Index (WPI), or a sub-index, was used for both sides of the GVA equation. Single deflation works acceptably when input and output prices move together. When they diverge, it produces errors.
The new approach is double deflation: inputs are deflated by an input price index and outputs by a separate output price index. …
Explain the difference between computing methodology of India's Gross Domestic Product (GDP) before the year 2015 and after the year 2015.
With reference to Indian economy, consider the following statements:
1.The rate of growth of Real Gross Domestic Product has steadily increased in the last decade.
2.The Gross Domestic Product at market prices (in rupees) has steadily increased in the last decade.
Which of the statements given above is/are correct?
A decrease in tax to GDP ratio of a country indicates which of the following?
1.Slowing economic growth rate
2.Less equitable distribution of national income
Select the correct answer using the code given below.
With reference to India's GDP computation methodology, consider the following statements:
1.Under single deflation, the same price index is used to deflate both inputs and outputs of a sector.
2.Under double deflation, inputs and outputs are deflated by separate price indices.
3.Double deflation always produces a higher real GVA estimate than single deflation, regardless of how input and output prices move.
Which of the statements given above is/are correct?
Consider the following statements regarding the Producer Price Index (PPI) used in India's GDP computation:
1.PPI measures prices received by producers at the factory gate.
2.PPI excludes net taxes and trade and transport margins.
3.PPI replaced the Consumer Price Index (CPI) as the sole deflator for both inputs and outputs in the new GDP series.
How many of the above statements are correct?
In India's new GDP series (base year 2022-23), MoSPI shifted from single deflation to double deflation. Which one of the following best explains why single deflation can underestimate real GVA growth?
Match the following price indices with what they primarily measure:
List I (Index) — List II (What it measures)
A.Consumer Price Index (CPI) — 1. Prices received by producers at the factory gate
B.Wholesale Price Index (WPI) — 2. Retail prices paid by final consumers
C.Producer Price Index (PPI) — 3. Prices of goods at the wholesale/bulk trade stage
Select the correct match:
With reference to India's quarterly GDP estimation, consider the following statements:
1.Quarterly GDP estimates use the benchmark-indicator approach, relying on high-frequency proxies.
2.Commercial vehicle sales and finished steel consumption are among the indicators used in this approach.
3.Quarterly estimates are never revised once officially released.
Which of the statements given above is/are correct?
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