John Gargani is co-author of the book Scaling Impact: Innovation for the Public Good (with Robert McLean), Past-President of the American Evaluation Association, and a practicing evaluator. He teaches graduate students and conducts research on evaluation methods for organizations working at the intersection of the private and public sectors. Current topics of research include methods for assessing the credibility of social return on investment estimates, techniques for reporting multiple perspectives on value, improved statistical models for payment for success contracts, and standardized measures of social impact.