As marketers continue to grapple with the best way to determine how much mileage they are actually getting from social marketing efforts, a new analysis from BzzAgent, the social marketing company owned by Dunnhumby, claims “a positive ROI for social marketing compared to other media, delivering an average return of $1.50 for every dollar spent.” The firm says that the Marketing Mix Modeling analysis of BzzAgent CPG social marketing programs, as measured by Nielsen, Genpact and Foresight ROI, took place between 2009 and 2011, and found an average return of $1.50 for every dollar spent.