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My iPad wrote Andiswa"...lol"..just meant original content is king

I agree that PageRank is a weak factor, but how else would I intelligently determine value of individual links from individual high-ranking pages? Also, I am not looking to estimate referral traffic - that seems an easier problem to tackle. So, the question remains: How 1 link from high-ranking web site would numerically influence organic search traffic. Page Rank of a site, Page Rank of a Page, Number of other external and internal links from that page, PageRank of our website - seems like all are important factors in a model that I am trying to find.