{"id":8926,"slug":"african-chart-coverage-leave-one-service-out-21oct-03nov-2026","title":"African chart coverage with each service removed in turn, 21 October to 3 November 2026","source":"This desk's own afw_chart_snapshot and afw_chart_entry collection store, 14 collection dates, 21 October to 3 November 2026","source_url":"","source_type":"computed","method":"Leave-one-service-out on the headline count. The headline is a union of markets, not a sum of a column, so the generic leave-one-row-out scenario test this desk runs on additive panels would double-count every market two services both publish. This table performs the correct test instead: for each service, the union is recomputed over the remaining five, and markets_in_union is the number of African markets that would still have a published daily song chart. markets_lost is the baseline 42 minus that figure. change_pct is markets_lost divided by 42, times -100, computed here rather than in prose. Population, stated plainly because it is the binding limit on this piece: this desk's collector requests a daily chart for 46 African storefronts, not all 54 African member states of the United Nations. The 46 are read directly out of afw_charts_countries() in wp-content\/mu-plugins\/afw-charts.php as it stood on 3 November 2026. Eight African states are therefore not requested at all and are recorded here as a gap in this desk's own instrument, not as a finding about any service. Window: the 14 consecutive collection dates from 2026-10-21 to 2026-11-03 inclusive. All six services returned a chart on all 14 of those dates, so no service is advantaged or penalised by a missed collection day. A market counts as covered by a service if that service published a daily song chart for it, and the collector persisted it, on at least one of the 14 dates. A 14-day union is used rather than a single day because one service, Apple Music, returned between 26 and 36 African markets on individual days inside the window while the other five were constant; a single-day reading would move the headline for a collection reason rather than a publishing one. The 42-market result is identical when computed over all 79 collection dates this desk holds, which is the strongest available check that the window is not doing the work. Only song charts are counted. Apple's separate daily album and music-video charts are excluded, which is why three markets Apple charts for albums only are not counted as covered. Published volume means the service publishes a stream or view count against each rank, as persisted into this desk's chart_entry store; rank-only charts are recorded as publishing no volume. Provenance of each feed, as configured in the collector: Apple Music Most Played and iTunes Top Songs are read from Apple's own public endpoints, rss.marketingtools.apple.com\/api\/v2\/{market}\/music\/most-played and itunes.apple.com\/{market}\/rss\/topsongs; Spotify, Shazam, Deezer and YouTube are read from kworb.net's public mirrors of each service's published chart. This desk's own composite chart is excluded throughout: the question is what the services publish, not what this desk derives from them.","unit":"count","license":"Afrobeats Wire's compilation and analysis are licensed CC BY 4.0. Rights in the underlying source data remain with the source named above.","confidence":"high","retrieved":"2026-11-03 13:54:28","n":7,"first_party":0,"columns":[{"key":"scenario","label":"Scenario","type":"text"},{"key":"markets_in_union","label":"African markets still charted","type":"number"},{"key":"markets_lost","label":"Markets lost","type":"number"},{"key":"change_pct","label":"Change vs all six, %","type":"number"}],"rows":[{"scenario":"All six services","markets_in_union":42,"markets_lost":0,"change_pct":0},{"scenario":"Remove Apple","markets_in_union":32,"markets_lost":10,"change_pct":-23.8},{"scenario":"Remove YouTube","markets_in_union":41,"markets_lost":1,"change_pct":-2.4},{"scenario":"Remove iTunes","markets_in_union":42,"markets_lost":0,"change_pct":0},{"scenario":"Remove Shazam","markets_in_union":42,"markets_lost":0,"change_pct":0},{"scenario":"Remove Deezer","markets_in_union":42,"markets_lost":0,"change_pct":0},{"scenario":"Remove Spotify","markets_in_union":42,"markets_lost":0,"change_pct":0}]}