In the aforementioned article, a footnote was accidentally omitted.
On the bottom of page 246, after the period that appears before “Similarly”, there should be a footnote that cites:
Richard Fletcher, Alessio Cornia, Lucas Graves, and Rasmus Kleis Nielsen, ‘Measuring the Reach of “Fake News” and Online Distribution in Europe,’ Reuters Institute for the Study of Journalism (February 2018), available at {https://reutersinstitute.politics.ox.ac.uk/our-research/measuring-reach-fake-news-and-online-disinformation-europe}.
The author apologises for this omission.