Damiana Data
GDP revisions · real-time data · Sep 18, 2026

The economy, then and now

The GDP report you heard on the news wasn't the final word.

2:08 video. Every figure in it comes from the checked story data.

What the video says

  1. The GDP report you heard on the news wasn't the final word.

    Since 1965, today's numbers tell a different story about 53 of 244 quarters.

  2. Give every quarter since 1965 one simple label.

    Was growth above its 10-year average? Was inflation? Growth is real GDP over the past year. Inflation is the GDP price index over the past year, not the consumer price index.

  3. Then label each quarter twice.

    Once with the numbers as first published. Once with the numbers as they read today.

  4. Here are the 53 quarters that changed label.

    That's 21.7%: 29 on growth, 21 on inflation, 3 on both.

  5. Q3 2008: first published, inflation ran above its average.

    First published: 2.7% against 2.4%. Today: 2.1% against 2.3%.

    Growth was below average both times.

  6. Q1 2019: first published, growth ran well above its average.

    First published: 3.2% against 1.9%. Today: 1.9% against 2.0%.

    Both examples were picked after the results were in.

  7. Recession quarters mostly kept their label.

    4 of 36 changed.

    Recession dates from the National Bureau of Economic Research.

  8. The newest quarter, Q2 2026, reads slower growth, hotter inflation.

    So far it has been published once.

  9. 12 of the 53 changes sat within 0.25 percentage points of the average.

    Labels: ESTIMATED, from one fixed rule. Why the numbers were revised: MISSING.

  10. Sources: Federal Reserve Bank of Philadelphia, Real-Time Data Set for Macroeconomists. National Bureau of Economic Research, US Business Cycle Expansions and Contractions.

    Real output and its price index as published in each vintage; real GNP in early vintages. For educational use. Not investment advice.

Evidence behind it

  • Confirmed: measured and verifiedPublished GDP and pricesCONFIRMED
  • Estimated: modelled or assumed, not measuredRegime labelsESTIMATED
  • Missing: not available or not testedWhy numbers were revisedMISSING

Marks open only as wide as each input’s evidence class allows. See Method.

Method

Source
Federal Reserve Bank of Philadelphia, Real-Time Data Set for Macroeconomists (used for informational, educational and research purposes, per their site terms)
Source
National Bureau of Economic Research, US Business Cycle Expansions and Contractions (copying permitted with attribution)
Scope
regime means only the table in REGIME_RULE_v1.md; inflation is the GDP price index
Scope
what changed, never why; revisions are not errors
Scope
examples were chosen after results were seen and the story says so
Scope
near tie is descriptive, defined after results, not part of the rule
Voice
generated voice, reading the on-screen lines
Music
Ben Elson / Callisto 8 / courtesy of Epidemic Sound

Provenance

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web video sha256
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story data sha256
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Backtests and model estimates on historical data. Not investment advice.