A friend and I were discussing Google's PR ranking system the other day and we began wondering if outbound links take away some of a page's PR value. Let's say I have a PR4 page (page A). If I link to 10 different pages from page A, will it then bleed some of it's PR value off to the other pages? Thus making it more difficult to reach PR5. Or, is page A's PR value unaffected by the outbound links? Meaning that it takes no more effort to reach PR5. Even if you have a large number of links, 50+, on the page? Do you think internal and external links might be treated differently? Obviously, only the guys at the plex know for sure but I would interested to hear what everyone's opinions are.
According to the original PR formula (which was published) yes PR does bleed to other sites (that's why a link in is good, you obtain some of that sites PR). Only Google know how far they have diverted from the original publishings. Internally obviously the PR is not lost, just redistributed around the site
no, out bound links won't affect on your PR of perticular page. Page rank is just calculation of incomming links to that perticular page. and ofcource since its proprietary algorithm of google no one can tell by confidence except big G .
You wouldn't happen to have a link to original PR formula would you? Personally, I reckon it must bleed off because my sites' pages seem to gain PR almost in parallel to the home page. Suggesting that the home page might actually be higher in PR if I didn't use a strong internal linking scheme.
You can just pass a tiny bit less PR through the other links on that site if you add one more link. Simple math.
That's why they now have the "no follow" tag. Links using that won't bleed PR. But, its not really a good idea to use it all the time except when you know the link itself is "bad".
You do not lose PR with outbound links. The no follow tag was developed to cut down on blog spammers - i.e. if the link they spam gets no benefit, they aren't as likely to do it. Each page can pass approximately 85% of its PR - but that PR is divided between the number of outgoing links i.e. if there is one outgoing link, it will get 85% of the pages PR, if there are two outgoing links, each link will share 85% (42.5% each).
You DO lose pr by linking out based on the original Pagerank document. That's not subject to debate, it's a fact. Whether or not Google still does this, who know2. IMO it doesn't matter; if you lose PR, it's not much. Two reasons why I don't worry about it: - PR is a relatively small factor these days. PR5 sites in competitive areas easily outrank PR6 and 7. So worrying that your page rank is going from 4.8765 to 4.87500 is futile. It won't affect your ranking in any noticeable fashion. - there's plenty of speculation that outbound linking helps your ranking. If that's true then any imaginable loss in PR IMO is more than made up for by the potential boost you'll get by linking to related sites. Look at it another way, by outbound linking you're helping the search engines determine what the page is talking about. Plus, there are plenty of examples of sites that link out like crazy that have high PR and rank. wikipedia is one example. In short, link out. It's good for everybody, including the search engines.
I'm not talking about anything in a patent filing as a patent doesn't mean it is being used. If there is any leak, it is so small that you wouldn't notice a difference between 1 outgoing link and 100 on a page. For all practical purposes, there is no leak. PR is highly overrated. There are many industry professionals (including the guy who is in charge of ASK search) who believe google abandoned PR for calculating SERPS some time ago. What google likes is backlinks from authority sites in a related sector. Authority sites tend to have high PR. If you get enough of these backlinks your PR is bound to increase, but it was the backlink, not the PR that improves your SERPS. If you buy a high PR link from a non-related site, it will increase you PR but do nothing for SERPS.
There is NO pr bleed. Its a myth. Don't justify your misunderstanding by saying "its in the patent" Geesh.
I didn't justify my misunderstanding. It is in the patent. Did you read my post? Gotta like self-proclaimed experts who tout their suppositions as fact. Fact: (which is what I say in my post) it's in the patent. Emperical evidence (which is what I say in my post): if it does bleed PR, it's so minimal as to not make a difference. Theory you pulled out of your ass:There is NO pr bleed. Now go look up the the term 'emperical evidence' in wikipedia so you at least have some idea what you're talking about. Claiming stuff about the google algorigthm that you know as 'factual' makes you look like an idiot. Why you choose to attack me on what's demonstratably true is beyond me.
I couldn't find anything in the original paper on PR about it bleeding either but let's assume that there is a PR bleed anyway. Hypothecially speaking. My site has 140 pages, all of which are being linked to from the home page, plus it has 10 external links. Even if the PR bleed is small, it would quickly add up when you consider that 150 links are bleeding the page of PR. Unless, of course, the amount bled is extremely tiny. In which case, why would they do that? It would seem to me that it should bleed at least enough to have some effect or not at all. I agree with the idea that PR doesn't necessarily help you in the SERPs. But, it is almost essential when trying to build links and even more so if you want to sell links.
I agree at that.. And link blogs like boingboing which links to 5-6 different sites a day will bleed to death, no?
Presumably, sites like that get massive amounts of incoming links as well. Boingboing has nearly two million IBLs and Wikipedia has more than five and a half million IBLs. (Wow!) Remember, I didn't suggest that PR bleeding could cause a PR9 site to become a PR4. I only suggested that it might be harder to obtain higher PR if all links on a page bleed some of it's PR.
Well as long as you are linking to quality sites you dont need to worry about that but make sure that you dont link to bad quality site because that can hurt a bit.
The google toolbar will report a site as PR4 or PR5, etc as they round the actual PR. A PR5 site could be PR5.01 to PR5.99 (you have no way to know). But let's assume a site is just a PR 5.00. This site puts a link on its page. 5.0 x 85% = 4.25. If there was only one out going link of this page, and it was the only incoming link your page had, it would get a PR4 with the next update. If there were two outgoing links on the PR 5.0 page, each link would be passing 4.25 divided by 2 or 2.125 PR. If there were 10 outgoing links on the page, each link would only pass .425 PR and you would need (10) of those links to make your site a PR4. If you only care about PR, looking at the PR of the page giving you the link can be misleading if there are a lot of links on the page. It can be much better to get a link on a PR3 or PR4 site that have few outgoing links vs. a link on a PR5 site with 60 outgoing links.
The thing you are missing is that PR is using a logarithmical scale. The toolbar value is just an approximation of that value.