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Also, there is no conclusive evidence that google manually "prevents" specific sites from passing PR. This is purely conjecture based on circumstantial evidence (as are most seo theories like the "sandbox").
The two best ways to check for such phenomenon are:
1)Check how many outbound links a specific pages has. A PR 8 with 100 outbound links will not pass PR as much as a PR 7 with 3 outbound links.
2)acquire the link in question and wait for 2 PR updates to pass. This used to be more or less feasible, but if Google continues to have 3 month intervals between PR updates, this method will prove too costly to implement.
However, that does not show whether a website is Google PR passing friendly or not. Is there a way to check that?
I'd really be interested to hear why you want to know if a site is able to pass PageRank or not? Will you refuse to link to or receive a link from a site if it does not pass the PageRank test?
(Please could you use the actual term PageRank as PR is generally associated with Public Relations, thanks).
Will you refuse to link to or receive a link from a site if it does not pass the PageRank test?
Definitely I would refuse a link exchange between my website that does pass PR and a website that does not pass the PR test. Also, who would be interested in buying a text link on a high PR website when that website does not pass PR?
Of course we check to see if a site is passing PR. Some sites hide the fact that they have blocked robots or some other trick to keep the reciprocal links from receiving PR.
Also if you look through these forums you will find PR - as related to Page Rank - used 10's of thousands of times and PR - as related to Public Relations - hardly ever used. This is a webmaster's forum and we all know what PR is.
I'd really be interested to hear why you want to know if a site is able to pass PageRank or not? Will you refuse to link to or receive a link from a site if it does not pass the PageRank test?
A site that deiberately blocks PR might well be doing other things I would not want to associate with. It's simply an indication of being "less than friendly" on the web, IMO.
That said, I've only run across one site I wouldn't link to. I don't rely on the PR factor, per se, but good PR is a bonus.
Try this! [google.com]
If you want to test whether PR is being passed you could hypothetically:
Find a page which ranks low for a given semi competitive term (~100-~1000), this will be our control. You dont want a page that ranks high on a competitive term - going from 2 to 1 is more difficult then from 500-400 and as such a high ranked page makes a bad control. Gauge where your control is preferably using a site that shows multiple datacenters side by side because there is a good deal of variation this low in the serps.
Aquire the link to your control page.
Gauge the same page as above after some days (3 or more dependant upon the linking pages PR).
If you have increased significantly then its likly pr is being passed.
Again that's just my experience, mileage may vary.
Also, just browse around the site for real links out (ya know, ones for the actual visitor's benefit) and see if they show up in backlinks, and perhaps you can tell that it is actually contributing to the PR by looking at some other things.
Why are being so self righteous IH? Of course we check to see if a site is passing PR. Some sites hide the fact that they have blocked robots or some other trick to keep the reciprocal links from receiving PR.
That has nothing to do with what I said. Sorry if you completely mis-understood it. I know sites ban their links pages and such in the robots.txt file, that wasn't the issue. Some sites use javascript, cgi scripts etc. to link to other sites which aren't always recognised as a link and therefore PageRank is not passed. The majority of sites linking to me to so in this manner. I don't get any PageRank boost, I don't get anchor text, I get nothing but maybe a few clicks a month. BUT I WOULD NEVER DREAM of turning down a link from a site because you never 100% know if that link is going to help you or not.
internetheaven,
Try this!
I think you meant to post that to mOftary as I'm not really interested in screening people that link to me. The bad neighbourhood theories were thrown out last year, try reading something more up to date.
Hugo, whether manual or not, if you're interested I could PM you an example of a network whose links/anchor text appears to have been blocked, or at least in the 3 examples I looked at.
The network is well established, and G shows the links, but they may as well not be there...
Also, just browse around the site for real links out (ya know, ones for the actual visitor's benefit) and see if they show up in backlinks, and perhaps you can tell that it is actually contributing to the PR by looking at some other things.
That was possible until not so long ago, problem now is you cannot see if they show up in backlinks. Google now only show samples (in the old days, they used to show every backlink from PR4+ pages).
Hugo, whether manual or not, if you're interested I could PM you an example of a network whose links/anchor text appears to have been blocked, or at least in the 3 examples I looked at.
I have many examples too. We are not here to discuss whether there are websites that dont pass PR or not, as there are indeed. Again and again, it was easy to find out that when Google was showing all PR4+ backlinks not just only a sample of backlinks as the way goes now.