Bibliography (9):

1. Top-K Off-Policy Correction for a REINFORCE Recommender System

2. Reinforcement Learning for Recommender Systems: A Case Study on Youtube

3. Are Social Media Ruining Our Lives? A Review of Meta-Analytic Evidence

4. Comparing stereotypes across racial and partisan lines: a study in affective polarization

5. No Polarization From Partisan News: Over-Time Evidence From Trace Data

6. Wikipedia Bibliography:

   1. YouTube

   2. Recommender systems

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

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

   4. https://en.wikipedia.org/wiki/Echo_chamber_(media)  :

      https://en.wikipedia.org/wiki/Echo_chamber_(media)