Separate Actual, Estimate, and Forecast

Economic outlook tables often place historical values and projections in adjacent columns. The visual continuity is useful, but the evidence states are different. An observed value can still be revised. An estimate can combine partial data with a model. A forecast describes a future outcome under assumptions. A chart should preserve these distinctions.

Add state to every observation

Create one row per economy, measure, period, and publication edition. Add a state field with the source’s language: actual, estimate, projection, or another defined term. Do not assign the state only from whether the year is before or after the report date. Institutions can estimate the latest completed year because final national data is not yet available.

The IMF publishes a Regional Economic Outlook for the Middle East and Central Asia with regional discussion, projections, and statistical material. Store the report edition with every value taken from it. A 2025 projection published in one edition is a different research record from the 2025 estimate or actual value published later.

A reliable table uses these fields:

1. economy or group;
2. indicator and unit;
3. reference period;
4. value;
5. observation state;
6. publication edition and release date;
7. source table or download;
8. source note; and
9. retrieval date.

Keep the value as published before rounding it for display. A chart can show one decimal place, but the research file should preserve the available precision.

Show the boundary

Use a vertical rule, background change, line style, or separate panel to show where estimates and forecasts begin. A legend is necessary, but it is not always sufficient. Readers should see the state change before they read a footnote.

Do not calculate historical forecast accuracy by comparing values from different definitions or editions without checking revisions. The later “actual” may use a revised national series, new weights, or a changed country group. First align the indicator definition, unit, and membership.

Preserve forecast vintages

Never overwrite an earlier forecast when a new outlook is released. Add a new vintage. This permits a revision table: what the institution expected at each release, what changed, and which explanation the report gave.

The revision itself is evidence. It can show the effect of new oil assumptions, conflict, policy changes, trade conditions, or incoming national data. The analyst should cite the source’s explanation before offering an independent cause.

End every outlook chart with two dates: the economic reference period and the publication date. A statement such as “growth in 2026” is incomplete if the reader cannot tell whether it is a current estimate, an old forecast, or a later revised observation. State is not decorative metadata. It is part of the value.