Acceleration in angel activity, as described in the most recent Halo Report, is a continuation of a general trend of increased valuations, deal sizes, and activity by angel groups since the start of 2011. Despite this, relatively little attention has been paid to the impacts of these angel groups on the firms in which they invest. Research by Harvard Business School Professors William Kerr and Josh Lerner, alongside MIT Professor Antoinette Schoar, expands on the entrepreneurial finance literature by drawing empirical evidence on the impacts of angel investments. Using a variety of econometric techniques, the authors find consistent evidence that investments by angel groups are associated with improved likelihood of survival for four or more years, higher levels of employment, and more traffic on firm websites. The authors also find limited evidence that financing by angel groups helps firms achieve successful exits and reach high employment levels.