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The bottom line, for me, anyway, is that the MOZ DA rank has always been one of the least useful metrics out there. Its accuracy is probably somewhere between the accuracy of Ms. Cleo and a Magic 8 Ball.
I beleive that Clay_More was referring to the PDF that EditorialGuy had posted, which are from 2004.
Many years ago there was an idea floating around for a method that a search engine could use to determine domain authority, although I think it might have been called "trust rank".
But I would love any recommendations to gauge url quality.