{"id":5250,"slug":"egypt-chart-decline-cohort-summary-13aug-7sep-2026","title":"Summary: cohort-level decline in Egypt’s confirmed-African Spotify streams, two windows","source":"Computed from this desk's egypt-chart-african-stream-change-by-artist-aug-sep-2026 and egypt-chart-african-stream-change-by-artist-mondays-2026 datasets","source_url":"","source_type":"computed","method":"For each window, every lead artist this desk's roster places as African-origin on Egypt's Spotify daily Top 200 on the window's two dates is summed at the start date and the end date. net_change_streams is end minus start across the whole cohort. gross_decline_streams sums fall_streams for only the artists who lost ground in that window (from egypt-chart-african-stream-change-by-artist-aug-sep-2026 and its Monday-matched counterpart). gross_gain_streams sums the positive change for artists who gained. top3_decline_streams sums fall_streams for the three largest decliners in that window and top3_share_of_decline_pct is that sum as a share of the window's own gross_decline_streams. The two windows use different date pairs and different lengths, 31 days against 21, disclosed in each row's window_days column, and are not a like-for-like trend; only the share each window's top three decliners hold of that window's own gross decline is compared across rows.","unit":"streams","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":"medium","retrieved":"2026-09-21 07:46:25","n":2,"first_party":0,"columns":[{"key":"window","label":"Window","type":"text"},{"key":"window_days","label":"Window length, days","type":"number"},{"key":"cohort_n","label":"Artists tracked","type":"number"},{"key":"start_streams","label":"Cohort streams, window start","type":"number"},{"key":"end_streams","label":"Cohort streams, window end","type":"number"},{"key":"net_change_streams","label":"Net change","type":"number"},{"key":"net_decline_streams","label":"Net decline (magnitude)","type":"number"},{"key":"gross_decline_streams","label":"Gross decline, losers only","type":"number"},{"key":"gross_gain_streams","label":"Gross gain, gainers only","type":"number"},{"key":"top3_artists","label":"Three largest decliners","type":"text"},{"key":"top3_decline_streams","label":"Top three combined decline","type":"number"},{"key":"top3_share_of_decline_pct","label":"Top three share of gross decline, %","type":"number"}],"rows":[{"window":"13 August to 13 September 2026 (calendar)","window_days":31,"cohort_n":24,"start_streams":3495133,"end_streams":2390280,"net_change_streams":-1104853,"net_decline_streams":1104853,"gross_decline_streams":1201868,"gross_gain_streams":97015,"top3_artists":"Cairokee, TUL8TE, Amr Diab","top3_decline_streams":915026,"top3_share_of_decline_pct":76.13},{"window":"Monday 17 August to Monday 7 September 2026 (weekday-matched)","window_days":21,"cohort_n":23,"start_streams":3121442,"end_streams":2572681,"net_change_streams":-548761,"net_decline_streams":548761,"gross_decline_streams":658910,"gross_gain_streams":110149,"top3_artists":"Cairokee, Amr Diab, TUL8TE","top3_decline_streams":511122,"top3_share_of_decline_pct":77.57}]}