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Search engines like Google interpret links to a web page as objective, peer-endorsed and machine-readable signs of value. Links have become the currency of the Web. With this economic value they also have power, affecting accessibility and knowledge on the Web.
Links and Power: The Political Economy of Linking on the Web [cmc.uib.no]
[pdf file]
Research Index Page [citeseer.nj.nec.com]
[citations and other formats]