Increasing polarization can’t be completely explained away by Facebook and Twitter, @SIEPR‘s Matt Gentzkow found.
@Stanford@SIEPR@HowardKurtz#Fiction: I warned you we should have kept calling “them” #tweeps. Now they think they are influential. @POTUS
https://johnrubens.wordpress.com/2017/03/20/stanford-research-mattgentzkow
