sharing across firms benefits consumers in our framework because it intensifies competition in our horizontal differentiation …, and this reduces their profitability. It might appear that platform sharing across firms makes consumers worse off because … channels through which a merger makes consumers worse off in the presence of platform sharing. …

consumers based, in part, on the quality and breadth of their provider network. We then review the large empirical literature on … of market structure on quality of health care. The paper then moves on to consider competition in health insurance …

We measure the impact of increased health insurer competition on negotiated hospital prices using detailed 2004 … competition. We find that in--creasing competition reduces hospital prices on average, but that the most attractive hospitals can … leverage increased competition to negotiate higher rates. This bargaining effect creates in--centives for further hospital …

This is a survey of the economic principles that underlie antitrust law and how those principles relate to competition … policy. We address four core subject areas: market power, collusion, mergers between competitors, and monopolization. In each …

under competition with non-deceptive counterfeiting and deceptive counterfeiting, respectively, as well as under monopoly … consumers have good faith in the market (believe in a low probability that any product is a counterfeit). When the proportion of …

services on the demand for piracy. We use ABC's decision to add its content to Hulu.com as a natural experiment and show that … it resulted in an economically and statistically significant drop in piracy of that content. …

competition policy issues, including market definition, mergers, monopolization, and coordinated behavior. It provides a survey of …