Article from the Wall Street Journal on system for determining Facebook news feeds.
Pew Research Center - Ideological Placement of Each Source's Audience
"Fake News" & Fact Checking
"Fake News" exists within a larger system of mis- and disinformation. Misinformation is defined as, "Wrong, or misleading information; the action of misinforming someone" (Oxford English Dictionary); and disinformation is defined as, "The dissemination of deliberately false information, esp. when supplied by a government or its agent to a foreign power or to the media, with the intention of influencing the policies or opinions of those who receive it" (Oxford English Dictionary). "Fake News", then, is those news stories that are inherently false and/or fabricated, having no quotes, sources, or verifiable facts. One form may be “clickbait” stories which are written for economic incentives (the writer profits based on the number of people who click on the story).
Real News about Fake News -- created by Harvard's Neiman Lab, includes a weekly update on the "growing stream of reporting on and data about fake news, misinformation, partisan content, and news literacy."
About "Fake" News-- a selection of articles discussing the production & dissemination of fake news, news consumption, and the politicization of the news media. f
FactCheck.org -- a project of the Annenberg Public Policy Center, for the purpose of checking the accuracy of statements, including advertisements, from politicians, pundits and special interest groups.
ProPublica -- an independent, non-profit newsroom that produces investigative journalism in the public interest.
Snopes.com -- Fact-checking site for "for urban legends, folklore, myths, rumors, and misinformation."