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3102RE: [webanalytics] Re: Behavioral differences in group that blocks 3rd party cookies?

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  • Laura Maschal
    Aug 2, 2005
    • 0 Attachment
      Eric --

      I remember at the E-metrics conference you seemed to think there was no
      "standard profile" of a cookie deleter -- slightly more technically aware
      than the average user, maybe, but then again maybe not much more -- has that
      changed at all with the research you've been doing in the past couple of
      months? Are we losing "super user" data from deletion, for instance?

      (Obviously for all sites this profile could be a little different -- what's
      scary is if, say, Amazon is losing data on the most savvy of its users who
      also happen to be the heaviest returning user base. Etc.)

      :: Laura Maschal
      Project Manager

      o: 202.470.1595
      c: 202.689.9884
      3333 14th Street, NW | Suite 300 | Washington, DC 20010

      -----Original Message-----
      From: webanalytics@yahoogroups.com [mailto:webanalytics@yahoogroups.com] On
      Behalf Of Eric Peterson
      Sent: Tuesday, August 02, 2005 3:26 PM
      To: webanalytics@yahoogroups.com
      Subject: [webanalytics] Re: Behavioral differences in group that blocks 3rd
      party cookies?

      I keep track of the latest and greatest data on cookie blocking and
      deletion in my JupBlog. The latest entry is:


      I don't have any data from the recent eMarketer report (don't have
      access) but I think this data, for the time being, is pretty accurate
      and current. About 25% monthly deletion for 1st party cookies (based
      on NetRating's study of Google) and 48% of third-party cookies deleted
      monthly (based on Atlas's study of their own cookies, which I
      recognize are in the high-risk category of third-party tracking domains).

      While these are single data points both were collected independently
      and are based on measured data, not survey responses (similar to the
      WebTrends study that Jason Palmer references). I'm actively working
      on gathering more data about 1st and 3rd party cookie deletion.

      I'm also working on a test to help web sites identify cookie deletion
      in their own data. If you have two years worth of data (new visitors,
      monthly returning visitors, monthly unique visitors) and would like to
      help out with this study anonymously, please write me directly.

      Eric Peterson

      --- In webanalytics@yahoogroups.com, "john marshall" <jmarshall@c...>
      > Thanks for clarifying that you do mean blocking.
      > I also should back-pedal on my statement that blocking is 'rare'.
      It's less
      > common than deletion, but it is indeed increasing. I don't mean to
      > the importance of the problem of blocking.
      > John Marshall
      > > Subject: [webanalytics] Re: Behavioral differences in group
      > > that blocks 3rd party cookies?
      > >
      > > Thanks for your response -
      > >
      > > I agree that, intuitively, missing 15% seems problematic.
      > >
      > > What I am looking for is something beyond that, however.
      > >
      > > Some data/evidence to back up or defeat the assertion that
      > > ... as the sample of Internet users who do NOT block 3rd
      > > party cookies (and I do mean block) diminishes ... that that
      > > shrinking sample will lose its value as a source of web
      > > analytics data. That, at some point, data on that group's
      > > behavior cannot meaningfully or reliably be extrapolated to the whole.

      > >
      > > --- In webanalytics@yahoogroups.com, "Amer, Mike" <mamer@v...> wrote:
      > > > > Blocking and rejection of third party cookies is rare. Did you
      > > perhaps
      > > > > intend to ask for data on those that *delete* third party
      > > cookies?
      > > > That
      > > > > is much more common.
      > > >
      > > > Third party cookies being blocked isn't exactly rare. Eric's
      > > blog
      > > > has an entry that mentions numbers from Coremetrics and WebTrends
      > > that
      > > > are both around 15%.
      > > >
      > > http://weblogs.jupiterresearch.com/analysts/peterson/archives/009497.
      > > htm
      > > > l If my analytics solution depended upon third-party cookies to
      > > track
      > > > visitors, I would find this very troubling.
      > > >
      > > > I suppose that with 85% of traffic being reported, you can
      > > still make
      > > > directional decisions. But if you are using web analytics to power
      > > > other marketing efforts, then missing out on 15% of traffic is a
      > > pretty
      > > > big deal.
      > > >
      > > > - Mike Amer
      > > > Victoria's Secret
      > >

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