With the presence of both switching cost and network externality, this paper builds a two-stage model for competition between two platforms. In stage one, an incumbent platform controls the market as a monopolist and sets a price to acquire a user base. In stage two, a new platform enters the...

As in most industries, in health care, information is a competitive asset, and we expect that health care providers may have incentive to protect their information from competitors. This study aims to understand how this incentive to protect information may be a barrier to the development of a...

This paper asks whether the large amounts of digital data that are typically observed on large technology platforms - such as Google, Facebook, Uber and Amazon - typically give rise to structural conditions that would lead to antitrust concerns. In particular, I evaluate whether digital data...

Switching costs and network effects bind customers to vendors if products are incompatible, locking customers or even markets in to early choices. Lock-in hinders customers from changing suppliers in response to (predictable or unpredictable) changes in efficiency, and gives vendors lucrative ex...