TY - JOUR AU - Luca, Michael TI - Designing Online Marketplaces: Trust and Reputation Mechanisms JF - National Bureau of Economic Research Working Paper Series VL - No. 22616 PY - 2016 Y2 - September 2016 DO - 10.3386/w22616 UR - http://www.nber.org/papers/w22616 L1 - http://www.nber.org/papers/w22616.pdf N1 - Author contact info: Michael Luca Harvard Business School Soldiers Field Boston, MA 02163 Tel: 617/495-8382 E-Mail: mluca@hbs.edu M1 - published as Michael Luca. "Designing Online Marketplaces: Trust and Reputation Mechanisms," in Shane Greenstein, Josh Lerner, and Scott Stern, editors, "Innovation Policy and the Economy, Volume 17" University of Chicago Press (2017) M3 - presented at "Innovation Policy and the Economy 2016", April 12, 2016 AB - Online marketplaces have proliferated over the past decade, creating new markets where none existed. By reducing transaction costs, online marketplaces facilitate transactions that otherwise would not have occurred and enable easier entry of small sellers. One central challenge faced by designers of online marketplaces is how to build enough trust to facilitate transactions between strangers. This paper provides an economist’s toolkit for designing online marketplaces, focusing on trust and reputation mechanisms. ER -