how do url redirects impact google page rank?

[individualist]

Hi,

I was wondering if you knew any research that had been done on this or wanted to maybe put this question out on your blog: How do URL redirects, such as those from <snip> , impact google page ranks? Can I use them for tracking purposes and still receive a good page rank? There are other service too (such as <snip> ) but I was more interested in the tracking aspect.

Thanks!

Ian

[edited by: physics at 3:10 am (utc) on Sep. 7, 2005]
[edit reason] No url drops please [/edit]