How can I maintain my website's authroity if I change the domain name?

[biggieshaws]

I have 2 sites.  Site A is doing well and growing, but has a low Domain Authority.  Site B is older, has a higher authority but I want to retire it as the site's topic is well dated.

Can I move all of my content on site A, to site B, change site B's name to Site A's name keep its higher authority and add all of the content and 301 redirect from site A to site B?

Whew,

Thanks for any thoughts,

Jeff Strassman

[danrawk]

hi -

are the site topics related? Site B, in addition to being older, has higher authority (i'm presuming) because you've built great content around the topic and attracted a community and audience.

if site A is totally unrelated, cannibalizing site B and moving everything over probably wont get you very fair. because all of the sudden, all of the things that helped site B rank well, will be irrelevant to the content that is now there!

[biggieshaws]

They are defiantly related Dan. Site A is for Primary Care Physicians.  Site B is for Clinical Geriatrics which is a part of the whole Primary Care Market.  Family doctors are always interested in the elderly.

I just need to know what will happen to site B and its Domain Authority if I change the domain name and then add a bunch more content (about 2,000 urls).  With the Change will I lose much of my 58 DA?

Thanks,

Jeff