TARIN reproduces what the Ghana Statistical Service publishes; it doesn't adjust it. What it adds is proof: every value keeps the file it came from, and fourteen rules test it before it reaches a chart, with eight more for the other StatsBank tables, five for the Bank of Ghana's exchange rates and five for world prices.
Most need no second source. GSS publishes both the index and the rates, so every rate can be recomputed from the index. With the basket weights stored, the parts of an index can be added up and compared with the published total. Counts are values per month, from the latest run.
| Rule | What it catches | StatsBank | GSS annex |
|---|
Oti and Bono East product groups don't add up to their own regional totals in StatsBank for most months since 2022, so the aggregation rule holds them. Elsewhere, holds are scattered.
Values held, by region and source, largest ten regions. Hover or tap a bar.
None of these were looked for. Each surfaced because a rule fired. The affected values stay off the site, or carry a warning, until GSS corrects them.
Since the 2021 rebase, StatsBank's national Non-food index repeats Food's, value for value, and its regional Non-food rates include a 46% fall in one month. The genuine series comes from the annex, where it matches GSS's press releases (9.5% for July 2025).
See both in the explorer →Rebuilt from the annex's product groups, a region's Non-food index normally lands within 0.1 to 0.6% of StatsBank's. In July and October 2025 most regions are off by 2 to 12%.
Their groups don't add up to their own regional totals: in StatsBank from 2022, in the annex from July 2025 to January 2026. In Oti in January 2026, Food carries Transport's exact value.
Oti's education index in both →In 162 of 768 region-months, the annex's region-by-group sheet (Annex 3) gives a regional total that differs from the regional sheet (Annex 4). Annex 4 matches StatsBank, so it is trusted and Annex 3's groups are held there.
The block GSS added for January 2021 to August 2022 doesn't join cleanly to September 2022, and September 2022 to April 2023 were typed at one decimal place. In May and June 2022 the national total disagrees with both the regions and the local/imported split.
The database was last updated on 5 February 2026 and ends at January 2026. Everything since comes from the monthly annex workbooks, which GSS still publishes with each bulletin.
The CPI rules lean on the index and its rates. The other StatsBank tables are tested by how their numbers must relate: a growth rate to its level, the parts to their total, a year to its quarters and months, one figure to the same figure in another table. A value is held only when the evidence points at it: it is the one number common to two failing checks, or a pattern names it. Otherwise the published total is flagged and nothing is withheld on a guess.
| Rule | What it catches | Comparisons | Now |
|---|
Grouped by table and rule, with the most recent case in the check's own words. Each links to the series in the catalogue.
The Bank of Ghana publishes a buying, selling and mid rate for 19 currencies every trading day, back to 1996. Each day is compared with the days around it. Other currencies are compared through their rate against the US dollar, so a sharp move of the cedi itself, like those of late 2022, is never taken for an error. A rate half as much again as its neighbours, or less than two-thirds of them, is a unit or keying slip and is held; one 15% away is flagged. GSS's monthly figures are checked against the average of BoG's days.
| Rule | What it catches | Comparisons | Now |
|---|
By currency and rule, with the most recent case in the check's own words. Each links to the currency in the catalogue.
The World Bank's monthly workbook of world commodity prices (the Pink Sheet) is read at the start of each month and every version is kept. A price of zero or less is held. A price that doubles or halves in a month is flagged; such moves are rare but real. An Excel error left in a cell where a price should be is flagged, and nothing is published for that month. The World Bank's Brent crude price is also compared with the IMF's for the same month. World diesel prices (the US Energy Information Administration's, through FRED) get the first two rules too, and FRED's two New York Harbor diesel series are compared with each other.
| Rule | What it catches | Comparisons | Now |
|---|
By commodity and rule, with the most recent case in the check's own words. Each links to the series in the catalogue.
Each file is archived exactly as received. Its SHA-256 fingerprint means anyone holding the same file can confirm it is the one TARIN read.
