“…More precisely, we investigate the correlation of the listening measure distributions between the two datasets, for the same genre (intra-genre, inter-dataset) and between all genres within each dataset 6 This figure is similar for Blues, Country, Jazz, Vocal, and World; but Electronic, Folk, HipHop, Metal, Pop, and Rock show smaller values for cumulative PC at top 20 artists (between 18% and 30%). 7 These cumulative PC values on the bottom 500 artists are similar for RnB and World; smaller (around 1%) for Blues, Country, EasyListening, and Vocal; and considerably higher for Electronic, Folk, HipHop, Jazz, Metal, Pop, Rap, and Rock (between 5% and 10%). 8 http://www.riaa.com/keystatistics.php?content_ selector=consumertrends 9 We are aware that the RIAA data only covers the USA, but given that the Last.fm community has a bias towards users from the US and that the Classical music share of Twitter users are even much lower, we are sure that the RIAA data does not underestimate the global share of Classical music in comparison to the social media data.…”