Setting up multiple domains in Google Analytics

Question

We have a dozen or so sites, as well as separate subdomains, so:

example.com example.co.uk us.example.com etc.

We used separate GA codes for each site. This works great, but that means adding a new site means getting a new code, and we cannot tell you the general statistics (for example, how many people have visited all sites, etc.). If we sent one code and installed separate profiles for each domain / subdomain:

1) Should we use _setDomainName ("none") or _setDomainName ("www.example.com") and _setDomainName ("www.example.co.uk") etc.

2) Will each domain profile process the other domains as separate (for example, we will say on example.co.uk, how many people visited example.com and completed goals, etc.)

3) Are there any drawbacks to this method.

Answer 1

This article from the Google Analytics blog describes how to set up a GA account for each site and a general “rollup” account located at the top - this will allow you to provide a separate GA administrator administrator for each site, where you can dig deep into each site account and show referrals between sites, and the summary will give common numbers (but I don’t think that he is going to report unique visitors throughout the collection of sites).

http://analytics.blogspot.com/2009/09/advanced-structure-your-account-with.html