Estimation and Optimization in Online Marketplaces ABSTRACT The emergence of e-commerce business models (such as Airbnb and Amazon) brings opportunities and challenges to their operations. This thesis studies several estimation and optimization problems within the online platform domain, using data-driven approaches in operations management. The thesis consists of three components. Motivated by the unique setting of Airbnb, in the first work, we consider a game-theoretical setup in which each seller on the platform provides a single-unit product and competes with…