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---- DMOZ and PR

inbound - 6:22 pm on Jun 1, 2005 (gmt 0)

(leaving aside the fact that you should not openly tell people that you have 5 DMOZ listings - They may go down to 1 if an editor sees what you have and does not like it)

The way calculations are done is not so much of a mystery, we just have to make some assumptions based on information that has probably changed.

A link from a PR4 page could give you a PR3 if it's your only inbound and there are not too many links on the page. That's no good as a measure when you are trying to find out how much benefit it will give you on top of your existing PR.

When trying to explain PR to anyone that cares I have always used a 'PR points' analogy as such (which is simplified and ingnores dampening etc):

1. You need (your guess here) 10 times more points to get to the next level of PR than the previous one so PR1 is 10 points, PR2 is 100, PR3 is 1000 etc

2. You don't know if a page is a low or high PR? so there could be up to a ten fold difference in the benefit you get from a link from any page depending on that, hence assume a mid value for calculations, e.g. a mid PR2 has 500 points to 'give out'

3. Also take your score as a mid value unless you have a better idea of where you stand.

4. Calculate the benefit of a link from a given page and by dividing the points that page has to 'give away' by the number of links that will be on the page with your link included. eg PR2 page with 4 current links= 500/(4+1)=100 points

5. Add this to your point score, do this with all links gained and you get a rough guide as to your upcoming PR.

E.G. a site has no inbounds but gains these:

PR4 with 4+1 links = 10000/5 = 2000
PR6 with 49+1 links = 1000000/50 = 20000
PR5 with 9+1 links = 100000/10 = 10000
PR3 with 4+1 links = 1000/5 = 200

Total = 32200 points = Low/Medium PR4

The very important part of this is that to get from PR5 to 6 you will need loads of low PR links, a few high PR links may do it.