The Prediction Graveyard

resolved · Unscored / disputed

New Zealand Treasury's May 2020 Budget forecast put June-quarter unemployment at 8.3%.

Source-backed summary; not presented as a verbatim quotation.

New Zealand Treasury
Government economic forecasting institution · New Zealand

Made: 2020-05-14Resolved: 2020-08-05
Original conceptual trajectory diagram illustrating No cause of death assigned
Reasoning and outcomes. Original illustration for The Prediction Graveyard. Aniruddh Jangid, 2026. Original digital diagram. CC BY 4.0. Changes: none. This is a conceptual diagram, not an archival image.

The world at the time.

The main Budget scenario assumed a severe pandemic employment shock. Treasury published alternative scenarios and noted that government support would cushion job losses.

What happened.

Stats NZ recorded June-quarter unemployment of 4.0%, far below the 8.3% forecast. Underutilisation increased, so the unemployment miss did not mean the labour market escaped serious disruption.

Predicted vs actual.

MetricPredictedActualVariance / caveat
June 2020 quarter unemployment (%)8.34-4.3

Forecast and observation.

Reported comparison (%)Forecast8.3Official result4%
Reported measure%
Forecast8.3
Official result4

Reported comparison (%). Bars compare sourced endpoints. Statistical vintages and scope are explained above.

The counter-signal.

Treasury itself identified government support as a cushion and published alternatives because uncertainty was high. Before the outcome release, Stats NZ warned that lockdown restricted job search and therefore affected unemployment classification.

Verdict.

Reasoning: contested · Outcome: wrong

The specified official unemployment-rate forecast was wrong by 4.3 percentage points. Measurement effects and support policy make broad claims about forecasting incompetence unsupported by this result alone.

Treasury forecast table and Stats NZ official summary verified. Stats NZ outcome page body did not render in browser extraction; outcome independently retrieved from official news archive/search summary and accompanying release. Measurement warning predates result, but postdates forecast.

Cause of death / explanatory lens.

No cause of death assigned

The lesson.

When lockdown changes who qualifies as unemployed, which supplementary labour-market indicators should accompany a rate forecast?

Sources.

  1. Budget Economic and Fiscal Update 2020primary · 2020-05-14 · claim and alternative scenarios
  2. COVID-19 and labour market statisticsprimary · 2020-07-22 · pre-resolution counter-signal
  3. Stats NZ news archive: June quarter resultsprimary · 2020-08-05 · outcome
  4. COVID-19 slows labour market activityprimary · 2020-08-05 · outcome interpretation

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