Posted by RobBeirneDigital marketers have always had one drum they loudly beat in front of traditional advertising channels: "We can measure what we do better than you." Now, we weren't embellishing the truth or anything — we can measure digital advertising performance at a much more granular level than we can traditional advertising. But it's not perfect. Multichannel digital marketing teams always have one niggling thought that keeps them awake at night: online activity is driving in-store sales and we ca...