supporting e commerce interactive advertising and online marketing www iab belgium be worktheweb pricewaterhousecoopers revenues study year 2001 summary methodology investments sector trend analysis 1 scope of the survey principal measuring point web site media reps purchasing centres agencies advertisers data gathering covered revenue by transaction earned trade barter packaged deals pricing model type banners content sponsorship category nomenclature pige cim limited to group pwc categories for international comparison basic figures on stratification size individual actions number undertaken per client
