AfDB – Data Innovation for Africa (DI4A)

100.0

Thirteen divisions, one basket

Each tile is a COICOP 2018 division. Select one to follow it against all items. Hatched tiles have no source yet: the index says so rather than guessing.

Why it moved

Each bar is a division's contribution to the change, in percentage points. The bars add up exactly to the change of the all-items index.

The shape of a change

How individual prices moved between the last two collections. A general rise moves the whole distribution; a promotion leaves most prices still and pulls a few far down.

What the basket covers

Where the prices come from

Look up a price

A sample of the items followed in every period: the largest movers of each division, and some of the steadiest. Click a column to sort.

How it is measured

The computation follows the Consumer Price Index Manual (2020). Same items from one period to the next, so that a price change is never confused with a change of product.

Why the Jevons formula

PJ = ∏ (pit / pit−1)1/n

The geometric mean of price relatives. It treats a doubling and a halving symmetrically. The Carli, an arithmetic mean, does not: when prices bounce, it drifts upwards with nothing having changed.

Against the official figures

The sources

Every source the register knows for this country, with what this run obtained from it. Excluded sources keep their reason: a refusal is the publisher's decision, it is recorded and never circumvented.