Consider Facebook's news feed experiment on user's emotions: https://www.nytimes.com/2014/06/30/technology/facebook-tinkers-with-users-emotions-in-news-feed-ex

Consider Facebook's news feed experiment on user's emotions: https://www.nytimes.com/2014/06/30/technology/facebook-tinkers-with-users-emotions-in-news-feed-experiment-stirring-outcry.html https://www.nytimes.com/2014/06/30/technology/facebook-tinke...