Overlap of Guess et al. and Facebook's news algorithm change (IMAGE)
Caption
(a) Average weekly number of views of news from trustworthy and untrustworthy sources,
calculated using the Facebook URLs dataset (Messing et al., 2020). Our estimates of untrustworthy news
are based on links to sources rated mixed, low, or very low for factual reporting by Media Bias/Fact
Check (MBFC) and shared at least 100 times, whereas Guess et al. consider any post by users with two or
more reports as untrustworthy. (b) Fraction of views of untrustworthy news among all views. The
horizontal dotted lines are averages of the points of the same color. We observe a drop during a period
overlapping with the experiment, likely due to the changes in the news feed algorithm.
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Chhandak et al.
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