The Welfare Effects of Social Media
http://web.stanford.edu/~gentzkow/research/facebook.pdf
"we show that Facebook deactivation (i) reduced online activity, including
other social media, while increasing offline activities such as watching TV alone and socializing
with family and friends; (ii) reduced both factual news knowledge and political polarization;
(iii) increased subjective well-being; and (iv) caused a large persistent reduction in Facebook
use after the experiment."