Google+ Authorship Penalties for Past Posts?

[eugeneku]

Our blog has recently been updated to allocate past posts from 2011 and on to link to one of our recent writers who just came on board in 2013. Our writer set up a new Google+ profile for our blog last month, and has tagged all of the past posts with his Google+ authorship code.

Is there a possibility that this could actually hurt our writer's authorship authority and our blog's authority, since the blog posts and the Google+ profile activation dates will not match up?

[TakeshiYoung]

I doubt it. Google authorship has only been around for a couple years now, but everybody is tagging their older posts from years back. Author rank is really only speculation at this point, and the only impact that including authorship markup will have is displaying the author snippet in the SERPs.