IMF workbook and updated data
Verified retains the data window in the published IMF workbook. Current uses the full usable newer WEO window, then starts the long-run assumptions. This changes both the baseline and the period covered by the additional climate comparison.
The two versions, with Uganda as the example
| Input or boundary | Verified | Current |
|---|---|---|
| Macrofiscal data | WEO October 2024 | WEO October 2026 |
| Last supplied WEO year, Uganda | 2029 | 2031 |
| Long-run assumptions, Uganda | Start in 2030 | Start in 2032 |
| Additional climate comparison, Uganda | Start in 2030, anchored at 2029 | Start in 2032, anchored at 2031 |
| Demography | UN World Population Prospects 2022 | UN World Population Prospects 2024 |
| Historical labour productivity | Workbook’s WDI series, through 2022 for Uganda | Retained from the workbook |
| Climate paths | Workbook’s 2024 FADCP climate data | Same data, on its original calendar |
The 2024 and 2026 WEO releases each provide a medium-term window. Current retains all usable years from the newer release instead of cutting it off at the old workbook’s 2029 endpoint. The selected run shows the supported boundary for that country. Missing required inputs can shorten the usable window or prevent a projection.
The WEO years contain source estimates and projections. This extract does not establish one verified outturn-versus-forecast cutoff for all country series. A last WEO year tells you where supplied data ends, not when historical observations ended.
October Current retains 175 selectable countries: 161 have a full usable horizon, six have a shorter horizon and eight cannot be projected. Libya becomes supported; Korea lacks the required fiscal history from 2009 in this source release. Albania ends at 2026 and Senegal at 2025. Read the selected country's coverage notice. The context panels compare source fields at a fixed 2029 reference year, which need not be that country's model endpoint. Their population inputs remain UN WPP 2024, productivity history remains the workbook's WDI record, and the rigidity reference remains the labelled April 2026 historical estimate.
What the later climate start means
The IMF Guide separates its long-run climate comparison from the near- and medium-term period. Current carries that structure forward after the newer WEO window. Moving this boundary is an Explorer choice. The dated IMF Guide does not prescribe a 2032 start or validate this extension.
For Uganda Current, all scenario paths follow the supplied baseline through 2031. The first additional climate effect uses the change in the climate index between calendar years 2031 and 2032. The 2030 and 2031 incremental effects are omitted from this comparison. They are not delayed and added back later. The climate dataset’s historical temperature reference is unchanged.
The WEO baseline is a supplied macrofiscal forecast, not a demonstrated climate-free counterfactual. Describe the output as an incremental scenario comparison from its stated start year. Results will differ from the workbook because the macrofiscal and demographic inputs, starting levels and comparison period differ.
Check the annual climate calculation
Let J(y) = 100 + the supplied climate GDP-loss percentage in year y. The annual productivity-growth adjustment is 100 × [J(y) / J(y−1) − 1]. For Current Uganda it is applied from 2032. Multiplying the annual index factors through year T gives J(T) / J(2031). This is an identity for the climate driver, not an exact identity for the model’s resulting GDP ratio.
Check the source: IMF User Guide, p. 19; official workbook, Climate Data and scenario worksheets.
How WEO-implied productivity is calculated
The IMF workbook derives a labour-productivity growth residual between the end of its World Development Indicators (WDI) history and the end of WEO. It combines real GDP growth with an employment-growth proxy. It is not a separately published WEO productivity forecast or an Explorer invention.
Use decimal rates in this identity and multiply the resulting productivity rate by 100 to express it as a percentage. The employment proxy uses working-age population growth. In Uganda Current, WDI levels end in 2022 and the residual covers 2023–2031. Long-run productivity assumptions then take over in 2032. The displayed bridge must be read for the selected country and data mode.
Check the source: IMF User Guide, p. 12; official workbook, Baseline!R12:X12 for the 2023–2029 residual in the published file.
Why the PDF and Excel dates differ
The User Guide is dated October 2024 and identifies version 1.0_11-04-2024. Its productivity explanation uses WDI through 2021, a residual through 2028 and projections from 2029. The downloadable workbook checked here identifies version 1.0_11-15-2024 on Dashboard!B10. It uses WDI through 2022, WEO through 2029 and long-run projections from 2030. Verified follows that later workbook’s actual inputs and formulas.
Download the reference IMF workbook · Download the IMF User Guide · Check the IMF’s current downloads
Keep the data revision with the result
Current uses the October 2026 WEO input revision, weo-2026-10-full-horizon-v1, with the existing rolling calculation policy. The older truncated and full-window April revisions remain preserved. New exports include data and calculation identities, the usable WEO endpoint and the climate start. Importing an older Current file restores its settings with a warning that the updated inputs can change results. Retain its original packet if you need the old numbers.