WPP declares 'business as usual' as it probes CEO Martin Sorrell, but questions swirl
Martin Sorrell, chief executive officer of WPP, during a Bloomberg Television interview at the World Economic Forum in Davos, Switzerland. (Simon Dawson/Bloomberg)
WPP Media has issued a report attacking the quality of desktop and mobile inventory sold via Publicis Groupe's Epsilon SSP, a rarity even among industry rivals.