In this paper, we study how a profit-maximizing platform implements a new policy, from which a representative retailer also experiences a private externality. Our analysis suggests that: (1) when the policy is highly valuable for the platform’s own interest, the platform may charge a fee from...

Two-sided marketplaces have grown rapidly over recent years and are ubiquitous in daily life. One important challenge is to design the marketplace to support the sustainability and efficiency of the ecosystem. This paper investigates the roles of selling formats in a two-sided marketplace with...