An apparatus for assessing the cost effectiveness of an advertising campaign includes an input for receiving a first set of data from at least one first data source and a second set of data from at least one second data source, an output, and a processor arranged to aggregate and analyse the first set...http://www.google.com/patents/US20050021396?utm_source=gb-gplus-sharePatent US20050021396 - Method of assessing the cost effectiveness of advertising
