Examine how methodological changes in GDP compilation (production/income vs expenditure approach) affect the credibility of growth estimates.

India's GDP is compiled through both the production/income and expenditure approaches, and the shift of the base year from 2011-12 to 2022-23 has revised the data sources and estimation techniques under both [1]. Such changes strengthen measurement, yet can unsettle public confidence unless carefully explained.

How methodological change strengthens credibility

• Better coverage of the informal economy: earlier, the unincorporated household sector was extrapolated using formal-sector indicators; annual ASUSE and PLFS surveys now allow direct, survey-based estimates each year [2].
• Richer administrative data: GSTN, MCA-21, MGT-7 filings, PFMS and e-Vahan replace proxy-based extrapolation in the production/income approach [3].
• Refined expenditure estimates: private final consumption is now built on a mixed approach — consumer expenditure survey, direct production data and commodity flow [3].
• Smoother quarterly series: the Proportional Denton method replaces pro-rata benchmarking, removing artificial year-end discontinuities that were misread as slowdowns [2].
• Transparency: discussion papers on both approaches were placed for public consultation before the methodology was frozen [4].

How it can weaken credibility

• Formalisation mistaken for growth: as GST turnover becomes a high-frequency input, a firm merely entering the tax net can appear as fresh output [2].
• Tax-driven coverage: administrative records follow statutory thresholds, not economic structure, leaving sub-threshold units invisible.
• Break in comparability: after the 2011-12 revision, divergence between the new series and the recomputed back series forced an official clarification [5].
• Upstream data quality: the National Statistical Commission has flagged mismatches between unit-level data and published summary tables [6].

Methodological revision is therefore not the enemy of credibility — an unrevised ruler would under-count the digital and platform economy. Credibility depends on disclosure: releasing the back series alongside the new one, separately reporting the formalisation effect, and giving the NSC statutory backing would let India's growth numbers be judged on method rather than suspicion.