Bibliography (12):

1. https://www.ftc.gov/news-events/news/press-releases/2019/09/google-youtube-will-pay-record-170-million-alleged-violations-childrens-privacy-law

2. https://techcrunch.com/2019/05/29/following-ftc-complaint-google-rolls-out-new-policies-around-kids-apps-on-google-play/

3. https://android-developers.googleblog.com/2019/05/building-safer-google-play-for-kids.html

4. https://pubsonline.informs.org/doi/suppl/10.1287/mnsc.2023.4726/suppl_file/mnsc.2023.4726.sm1.pdf#page=5

5. https://pubsonline.informs.org/doi/suppl/10.1287/mnsc.2023.4726/suppl_file/mnsc.2023.4726.sm1.pdf#page=12

6. Wikipedia Bibliography:

   1. Two-sided market

   2. https://en.wikipedia.org/wiki/Targeted_advertising  :

      https://en.wikipedia.org/wiki/Targeted_advertising

   3. https://en.wikipedia.org/wiki/Information_privacy  :

      https://en.wikipedia.org/wiki/Information_privacy

   4. Google

   5. Android (operating system)

   6. Google Play

   7. Difference in differences