Firms in traditional markets often compete in output à la Cournot. In this paper, we consider Cournot competition between platforms in a two-sided market. We find that the markup and markdown terms are distorted toward zero for greater levels of platform competition and for greater levels of...

Platforms often use fee discrimination within their marketplace (e.g., Amazon, eBay, and Uber specify a variety of merchant fees). To better understand the impact of marketplace fee discrimination, we develop a model that allows us to determine equilibrium fee and category decisions that depend...

In platform markets, consumers often choose which platform to use for making a bundle of transactions with sellers rather than for each transaction. Based on a competition-in-utility framework, I analyze the impact of such usage lock-in on platform competition. Usage lock-in allows platforms to...

We investigate the impact of search order distortion by a vertically integrated platform that intermediates the products of a third-party seller as well as its own product. The platform can steer consumers to search for its own product first. We show that the effects of search order distortion...

Fee discrimination is commonly used by marketplace platforms (e.g., Amazon, eBay, and Uber). To better understand how marketplace fee discrimination interacts with the hybrid platform business model, we model a marketplace platform that manages fees and categories across a continuum of retail...