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...

This paper examines strategic contracting between a monopoly platform and suppliers that sell their goods through the platform. I consider two competing suppliers: a high-volume supplier with the larger potential demand and a low-volume supplier with the smaller one. Each supplier chooses one of...

This paper presents a model in which a monopoly platform not only operates a marketplace intermediating direct transactions between consumers and third-party sellers, but also sells its first-party products at the marketplace, which is designated herein as platform encroachment. When...

This paper presents an examination of how the offering rebates to consumers from an e-commerce platform affects both pricing and multi-channel management of a third-party seller who distributes goods through the platform's online marketplace in addition to an independent offline retailer. The...