Subdomains vs. separate URLs

I have a question if anyone can answer for me:
For SEO purposes, is it better to have separate domains or subdomains?
Any suggestions / ideas?
Thanks

This question has been asked a lot of times before.

Please refer to one of the following threads:

http://www.sitepoint.com/forums/showthread.php?t=625060&highlight=subdomain

In the future, Please Search using the vBulletin’s Advanced Search and SitePoint’s [URL=“http://search.sitepoint.com/”]Advanced Search before you post.

Thread closed.