Consumer prices · 13 categories · latest 2025-12-01
Source: International Monetary Fund. Data as of 2026-02-01. Collected by Living Inflation Data, HBS Innovations in Economic Measurement (IEM) Lab www.iemlab.org.
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2 recorded findings for this country, shown exactly as in the full quality register.
| Country | Source | Periods | Status | Series | Found | Detected by |
|---|---|---|---|---|---|---|
| Bahrain, Kingdom of, Bangladesh, Chad, Congo, Democratic Republic of the, Congo, Republic of, Djibouti, Gabon, Pakistan | IMF | 2019-12-01, 2025-05-01, 2017-01-01, 2009-12-01, 2014-06-01, 2014-07-01, 2019-04-01, 2012-07-01 | confirmed | BGD.CPI_CP09_*, BHR.CPI_CP09_*, COD.CPI_CP07_* +5 more | 2026-09-02 | Single-month index anomaly |
| Eight single bad months in eight countries, one division each, with nothing tying them together beyond the shape and the source. Kept as one entry rather than eight near-identical ones, with every case named so none is hidden behind a summary: Bangladesh recreation 149.90 in Dec 2019 between 98.1 and 98.6; Bahrain recreation 101.7 in May 2025 between 64.3 and 67.6; DR Congo transport 98.1 in Jan 2017 between 130.5 and 131.2; Congo communication 111.2 in Dec 2009 between 72.7 and 78.2; Djibouti alcohol and tobacco 158.8 in Jun 2014 between 80.7 and 89.9; Gabon communication 100.3 in Jul 2014 between 135.0 and 138.8; Pakistan restaurants 237.3 in Apr 2019 between 119.5 and 120.8, almost exactly double; Chad housing 60.2 in Jul 2012 between 84.0 and 89.4. In every case the two neighbours agree with each other far more closely than either agrees with the flagged month, and the series continues from where it left off. | ||||||
| Gabon | IMF | 2015-05-01 | confirmed | GAB.CPI_CP08_* | 2026-09-02 | Possible index rebasing |
| Gabon's communication index steps 152.96 -> 96.58 in May 2015 (-36.9%) and settles at 0.56x. It is the one series in this class that fails the base check: Gabon declares 2018A and this division averages 94.8 across 2018, not 100, so its published history is not on the base the source states for it. That is independent evidence of a splice, and it is the strongest single piece of evidence in this group. The series also carries a bad month in July 2014 (see imf-isolated-outlier-months), which is a separate fault. The step is permanent, confined to one division, and not a revision: these values were published this way. What the data CANNOT settle is whether the division was put on a new base by itself or its prices really fell, because both produce exactly this shape and nothing held here separates them -- the series is verified at 100 in the reference period the source declares, which is true either way. The country's headline index barely moves in the same month, which is suggestive and not conclusive: these are mostly light divisions, so a real fall would leave only a small mark on the aggregate. What IS certain is the consequence, because the source's own rates are this index restated -- the published month-over-month and year-over-year figures equal the index ratios at all 388,805 and 370,534 overlapping cells, checked 2026-09-02. So if the step is a re-reference, the source's own rates divide across it, and the reader has to be told. | ||||||