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Is the site or the page?

Incoming links?

     
2:50 pm on Aug 4, 2002 (gmt 0)

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I have a quick question for the Google Guru's. When determining which incoming links you want to exchange with, is the PR that's "transferred" to your site based upon the PR of the site or the PR of the page. I just got a link from a site which is PR8 on it's home page, but the link is on a PR7 page. Which will count?

Richard Lowe

3:24 pm on Aug 4, 2002 (gmt 0)

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Hi Rich,

I think it's the real PR of the page. The amount of 'transfered' PR your linked page gets however, depends on the number of links on that linking page. If the real PR of the linking page is 7, and there are about 20 links (to internal + external pages) on it, the transfered PR should be around 5.6. If there are about 100 links on it, the transfered PR shoudl be around 4.9.

4:01 pm on Aug 4, 2002 (gmt 0)

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pvdm,
I agree that it is the PR of the page that matters. However, I am curious how you arrived at the "5.6" and "4.9" numbers.
4:11 pm on Aug 5, 2002 (gmt 0)

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pvdm's taking a Toolbar log base of 10.

log10(107 x 0.8 / 20) = 5.6
log10(107 x 0.8 / 100) = 4.9

5:09 pm on Aug 5, 2002 (gmt 0)

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Thanks for the mathematical detective work ciml. I tried to decipher it myself but I forgot to include the 0.80 (or is it 0.85). Anyway I guess I was just trying to stir up another PR log scale debate. I happen to think the log scale is something like 3 and not 10 but I guess Ill be O.K. if I just let it be. After all the bottom line is that links from pages are good and links from pages with high toolbar PR values are even better.
5:14 pm on Aug 5, 2002 (gmt 0)

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I guess it just 'seems' like 'site PR' because most inbound links carrying PR are to the home page and that its easy to get used to the theme "pyramid of PR" alongside your theme and content.

Perhaps a good call for subdomains....and why people use them :) More tips of the pyramid to funnel PR into sorta thing from the recips and "extra" listings they can squeeze

7:06 pm on Aug 5, 2002 (gmt 0)

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gmoney:
> I guess I was just trying to stir up another PR log scale

The most comfortable fit for my experience thus far is about base 15 with about 0.91 decay factor, but the margins of error may be huge.

If the Toolbar log scale base is 3, then we should expect a much quicker reduction of PageRank when following links from pages with more than 3 links (currently I think about 1/2.5 notch on the Toolbar for a link from page with 3 links).

7:16 pm on Aug 5, 2002 (gmt 0)

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Gmoney,

Regarding the log base, I wouldn't care too much. I simulated different log bases. Nearly everybody seems to agree that it's probably between 7 and 10. But the net differences between both are minimal.

PageRank of linking page: 7
Number of links: 20
PR passed to each link with Log base 10:5.6
PR passed to each link with Log base 7 :5.35

PageRank of linking page: 7
Number of links: 100
PR passed to each link with Log base 10:4.9
PR passed to each link with Log base 7 :4.52

I make my own calculations based on the worst case: log base 7, but feel free to pick the one that you prefer. I am more interested in the relative evolution as the number of links gets higher, than the absolute value. The PR value passed to each decreases sharply with the number of links in the beginning, but CIML is absolutely right: once above the 20 links (which is the average number of links on web pages), the decrease is minimal. So don't let that stop you linking externally!

CIML, thank you for filling in the formula! ;-)

7:39 pm on Aug 5, 2002 (gmt 0)

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pvdm:
> ...thank you for filling in the formula!

I haven't; as I say the margin of error is huge.

One day... :)

 

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