{"id":10342,"slug":"african-presence-series-column-relationships-13aug-14nov-2026","title":"How the columns of this desk’s African Spotify chart series move against each other, 62 readings to 14 November 2026","source":"This desk's own african-presence-over-time series, 62 collection dates from 13 August to 14 November 2026","source_url":"","source_type":"computed","method":"Two pairs of columns from this desk's african-presence-over-time series, measured across the same 62 readings. pearson_r is the Pearson product-moment correlation between the two named columns, computed on the 62 paired values in collection order. slope_first_per_reading and slope_second_per_reading are ordinary least squares slopes of the first-named and second-named column respectively against reading index, so the unit is change per reading and not change per day, because collection dates are not evenly spaced. Values are rounded to four and five decimal places respectively. A correlation here is a description of how two measured columns moved together over one 93-day window on one platform's published charts. It is not a causal claim, it does not establish that either column drives the other, and with 62 non-independent readings of an autocorrelated series it should not be read as a significance test. It is reported because the sign is the surprising part: the two pairs both move in opposite directions to each other.","unit":"","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":"2026-11-15 13:51:29","n":2,"first_party":0,"columns":[{"key":"column_pair","label":"Column pair, first against second","type":"text"},{"key":"pearson_r","label":"Pearson r","type":"number"},{"key":"readings","label":"Readings","type":"number"},{"key":"slope_first_per_reading","label":"Slope of first column, per reading","type":"number"},{"key":"slope_second_per_reading","label":"Slope of second column, per reading","type":"number"}],"rows":[{"column_pair":"African artists charting against charts carrying any African artist","pearson_r":-0.4903,"readings":62,"slope_first_per_reading":0.05815,"slope_second_per_reading":-0.04918},{"column_pair":"African share of all chart streams against share earned outside Africa","pearson_r":-0.6468,"readings":62,"slope_first_per_reading":0.00571,"slope_second_per_reading":-0.02094}]}