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Nielsen data as inaccurate as Alexa data?

Posted by webmeasurement on September 8th, 2006 filed in Webanalytics general

Recently after all the discussion about the accuracy of Alexa, Comscore, Nielsen or Hitwise I dugg a little bit more into the different vendors.

As mentioned before Alexa has the problem, that it collects traffic with the Alexa toolbar, which is usually used by webmasters or technical interested users. This obviously caused technical related websites to rank higher than non-technical websites (Just google NYTimes vs. Digg.com).

Nielsen collects data with its Nielsen/Netratings Internet Panel software. The software can be downloaded for free and is available for everybody. This causes the same problem as with Alexa. Websites can promote the Nielsen Netratings Internet Panel software to its customers with the effect, that their numbers look much better.

Hitwise seems to be the most advanced technique, b/c they collect data directly from the ISPs.

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