We survey the economics literature on dual-role platforms and self-preferencing by them.
Existing studies mainly consist of theoretical studies, but there are also some empirical …

I review the literature on eCommerce platforms with particular emphasis on the antitrust
debate on Amazon. The business model of hybrid marketplaces is based on monetization …

A monopolist platform uses data to match heterogeneous consumers with multiproduct
sellers. The consumers can purchase the products on the platform or search off the platform …

A marketplace such as Amazon hosts many products by third party sellers and acts as a first
party or private label retailer. Assuming an advantage of Amazon in logistics and of sellers in …

Users often turn to subscription video on demand (SVOD) platforms for entertainment.
However, these platforms sometimes employ manipulative tactics that undermine a user's …

To ensure contestability and fairness in digital markets, policy makers worldwide discuss
whether interoperability obligations are an appropriate regulatory tool to achieve these …

We analyze device-funded and ad-funded platforms with differentiated ecosystems
supporting apps provided under monopolistic competition. The incentives of a device …

Do users receive their fair contribution to digital ecosystems? The frequent accusations of
excessive platform fees and self-preferencing leveled at dominant gatekeepers raise the …

Abstract The European Commission has proposed a new regulatory tool to govern of digital
markets. The Digital Markets Act (DMA) intents to limit the market behavior of so-called …

We study platforms setting access prices and commissions on revenues of sellers engaged
in monopolistic competition with free entry, such as the app providers on the app stores of …