The Science Of Analytics By David Erickson | May 21, 2011 A presentation by Dan Zarrella of HubSpot about how to measure online ROI. Found at Slideshare from HubSpot. Posted in Marketing Analytics, Social Media Marketing and tagged Dan Zarrella, HubSpot, Measurement, Online ROI, Presentation, ROI, Social Media ROI About David Erickson View all posts by David Erickson →