EditorialGuy - 10:57 pm on Oct 2, 2013 (gmt 0)
Right, but there are also a lot of areas where these overlap.
Maybe, but Google is already making judgments about what constitutes "authored content" when it decides whether to serve rich snippets.
If Google decides that John Doe's page about invertebrate widgetology is "authored content" that qualifies for an author photo and byline in a SERP for that topic, isn't it reasonable for Google to take Mr. Doe's author history into account when figuring out how the page should rank?
To put it another way, why shouldn't the author's track record be taken into account in the same way that "domain authority" is? If Jonas Salk were alive today and writing a blog post about polio vaccine, wouldn't you expect that to rank as high on a SERP as an article on the same topic at Examiner.com or About.com?
I don't think Google has any doubts at all about using authorship ("AuthorRank," if you prefer) as a ranking factor, once the details have been worked out.