1. As streaming reaches flood stage, does it stimulate or depress music sales?
2. Aswad J.(2017).Spotify's Troy Carter talks royalties songwriters streaming business and more in expansive Q&A. Variety. Accessed on 8 March 2021. Retrieved fromhttp://variety.com/2017/biz/news/troy-carter-talks-royalties-streaming-more-in-qa-1202458272/
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4. Bundling Information Goods: Pricing, Profits, and Efficiency
5. Bundling and Competition on the Internet