Is the Page Authority/Rank of my corporate site affected by my blog's PA/PR and vice versa?

[Kendi]

If I host my blog on my corporate site (it is a wordpress blog) will the page authority and page rank of my site translate to the blog?  And does this also go the other way around?  My gut says this would make sense, and I think I have seen it in action with other corporate sites that host their wordpress blogs, but I want to be completely sure.  Even better, if someone can explain to me how this works, that would be super helpful!

[j0a0vargas]

Depends, I need to know how is the domain of your blog and your site.

The domain contains .wordpress.com?

[Copstead]

It will all depend on how you setup your blog, a subdomain or a subfolder.

subdomain: http://blog.example.com

subfolder: http://www.example.com/blog/

If you are setting the blog up as a subfolder, then yes, the blog will help the site, and vise versa.  (It will also hurt the site as well).  For optimal SEO, I would do it this way. http://www.example.com/blog/

Rand wrote a great post about this topic here:

Root Domains, Subdomains vs. Subfolders and The Microsite Debate

http://www.seomoz.org/blog/understanding-root-domains-subdomains-vs-subfolders-microsites