Every price tells a story.

Each version keeps fixed quantities and uses complete daily ordinary-price totals. At a replacement, both versions must have positive totals on the documented overlap date. Later index = index on overlap date × new basket cost ÷ new basket cost on overlap date. Missing days stay missing.

The price difference between versions on the overlap date is excluded from inflation. This assumes that difference reflects the changed products or retailers; it is not a measured quality adjustment. The 2023 link was reconstructed in 2026. Collection gaps are not interpolated.

1. v1 · Reviewed: 2026-09-12

   Original eight-staple basket across five retailers.

2. v2 · Reviewed: 2026-09-22

   Retrospective replacement of flour, eggs, butter and coffee with Coop/Willys products. The original butter stopped being observed in 2023; other retailers have less recent coverage. The last complete overlap is used, not the review date.

   Applies after overlap date: 2023-04-18

   2023-04-18 · Old basket: 194.00 kr · New basket: 195.53 kr