METHODS AND APPARATUS TO DE-DUPLICATE IMPRESSION INFORMATION RELATED APPLICATIONS

摘要

Methods and apparatus to de-duplicate impression information are disclosed. An example method to de-duplicate media impression information includes determining an overlap between cookies of a first database proprietor and cookies of a second database proprietor on client computers; determining duplicate impression information based on first impression information associated with the first database proprietor, second impression information associated with the second database proprietor, and the overlap; and determining unduplicated impression information based on the duplicate impression information, the first impression information, and the second impression information.