Historical comparisons provide a reference for examining how the model behaves. They use pre-event accounts and trade, with GDP differences measured against a specified forecast baseline.
2020 pandemic-era disruptions
15 country comparisons against the recorded forecast baseline.
2022 inflation and energy pressures
15 country comparisons of GDP forecast gaps.
Japan’s 2011 earthquake
A comparison with the April 2011 GDP forecast revision.
Kenya’s 2017 drought and credit conditions
A comparison with the April 2017 GDP forecast revision.
The historical gaps reflect concurrent shocks, policy responses, forecast error and revisions. The comparisons fit annual GDP level differences. Following-year recovery stays outside the fit where a comparable observation is available, so subsequent errors remain visible.