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 …

We study a hybrid marketplace such as Amazon that sells its own products and sets
commissions on third-party sellers that engage in monopolistic competition with free entry …

We study how regulating data usage impacts innovation in digital markets. Platforms
commonly use proprietary data about third-party sellers to inform their own competing …

We illustrate conditions under which a trade platform selling its own products alongside third-
party sellers benefits or harms consumers. This benefits consumers by lowering prices in a …

Regulators are concerned that by introducing their own private labels, dominant online
marketplace operators distort competition in their own favor. This paper addresses this …

Platform-based ecosystems dominate e-commerce, generating value through participant
growth and resulting network effects. However, research has lacked any conceptualization …

This paper examines how the equilibrium effects of a public option on the private market
impact its optimal design. I develop a model in which a policymaker can choose the quality …

Biased recommendations arise naturally in a market with heterogeneous consumers: a
seller offers a product to a mix of consumers who can purchase through an intermediary or …

Double marginalization is a robust phenomenon in procurement under asymmetric
information when sophisticated contracts can be implemented. In this context, vertical …