Hoping to head off business search competitor Quigo at the vertical market pass, Google made a fanfare about its new agreement to have vertical trade publication network VNU use its AdWords system. Google's director of B-to-B said that the search engine has the "depth of advertisers" to provide relevant ads for each of the publications' topics. VNU, publisher of marketing books AdWeek, BrandWeek and MediaWeek, among many others, has not yet been able to sell online display advertising on its websites as successfully as it has in print. Interestingly, other trade magazines in the same space have recently dropped AdWords placements in favor of the typically higher revenue generated from the display advertising they sell themselves.