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Itzhak Fisher, Nielsen Online

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What: Executive chairman
Where
: Nielsen Online, New York
Why
: Itzhak leads Nielsen Online, a division of Nielsen Co. formed in June when Nielsen completed its acquisition of NetRatings. Nielsen Online includes the Nielsen//NetRatings Internet audience measurement service and Nielsen BuzzMetrics, which tracks user-generated media. Itzhak was previously chairman of Trendum, a search and analytics company that acquired BuzzMetrics in 2005. He served as chairman of Nielsen BuzzMetrics prior to his current position.
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