Presenter: Ben Greiner Feedback information, collected from market participants about their trading experiences, can be biased. The rules under which the feedback is given shape the incentives and motivations of participants to report truthfully. Distorted feedback information may hamper trust and trustworthiness in a market. We use theoretical models, empirical data analyses, surveys, and laboratory experiments to study feedback pattern and information flows on market platforms like eBay. The goal is to design feedback systems that lead to more accurate reputation information, more trust, and more efficient trade.   Ben Greiner is an Associate Professor at the School of Economics at UNSW. He works in experimental economics and market design. Prior to joining UNSW in 2008, Ben worked at the Max Planck Institute of Economics and the University of Cologne in Germany, where he also received his PhD, and spent two years as a Postdoc at Harvard University.​