Brand marketers underwrite the ad industry’s creative endeavors. But many still aren’t sure they can justify the output of their creative agencies to C-suite colleagues. According to a survey of senior marketers conducted by measurement firm Gain Theory , 49% said they weren’t confident that the data they had would help them defend marketing decisions to a CFO. This is a member-exclusive article from Digiday. Continue reading it on digiday.com and subscribe to continue reading content like this.