Dymero - 3:19 pm on Jul 8, 2013 (gmt 0)
and "authority signature value" for authors
No, author markup isn't an indicator of authority alone. However, I could see Google bumping you up a spot or two if it's already associated your name (as verified with a Google+ account, of course) as authority on a certain topic. Thus expanding "authority" beyond the bounds of a single website, since it is not uncommon for authorities on a topic to write on multiple websites these days.