1. Global Music Report: Music Consumption Exploding Worldwide, Accessed June 3, 2016 from http://www.ifpi.org/downloads/GMR2016.pdf and http://www.ifpi.org/facts-and-stats.php
2. Global Music Report 2016, International Federation of the Phonographic Industry. Accessed June 6, 2016 from http://www.billboard.com/articles/columns/chart-beat/6777905/adele-25-sales-first-week-us
3. Steel, Emily, “Netflix, Amazon and Hulu No Longer Find Themselves Upstarts in Online Streaming” New York Times, March 24, 2015
4. Waldfogel, Joel, “Digitization and the Quality of New Media Products: The Case of Music,” Working paper, August 2013
5. Bruni, Frank, New York Times, June 5, 2014