Once the votes in election 2012 were counted, the Sunlight Foundation did some figuring of our own, calculating the percentage of money spent by outside groups in elections that helped winning candidates or hurt losing ones; we called that percentage return on investment (ROI). Mark your calendars for Thursday, Nov 29, at 1 p.m. for a webinar explaining how we did it, including a close up look at the ROI data. We will also debut our Congressional ROI data set, which shows how groups fared when the massive amounts of presidential election spending are removed from the totals. In this webinar we will show you how to dive into the data on a more granular level to tell the story behind the numbers. Sign up for the webinar here.