High-speed internet has increased the amount of information available in health care markets. Online information may improve health outcomes if it reduces information frictions and helps patients choose higher quality providers or causes providers to improve quality. We examine how health...

Consumer reviews, especially those expressing concerns of product quality, are crucial for the credibility of online platforms. However, reviews that criticize a product or service may also dissuade buyers from using the platform, creating an incentive to blur the visibility of critical reviews....

This study examines how industry peers share information when they are engaged in tacit collusion. We develop a model of firms' information sharing and production decisions and use it to establish that firms engaged in tacit collusion are more likely to share information when current market...

Clustering of IPO underwriting spreads at 7% poses two important puzzles: Is the market for U.S. equity underwriting services anti-competitive and why do equity underwriters invest in reputation-building? This study resolves both puzzles. Modeling endogeneity of firm-underwriter choice using a...

Multihoming – the decision to design a complement to operate on multiple platforms – is becoming increasingly common in many platform markets. Perceived wisdom suggests that multihoming is beneficial for complement providers as they expand their market reach, but it reduces differentiation...

This paper seeks to understand the incentives of affiliated hospitals in choosing health information technology (IT) vendors. By adopting a system popular in the local market, hospitals may benefit from complementarities but also worry about losing patients. If benefits outweigh the competitive...

This paper explores the adoption choice of electronic medical records by U.S hospitals, which could exhibit strategic complements or substitutes. I find complementarities in adoption through a reduced-form analysis with instruments for the unobserved market characteristics. I further develop a...

Health insurance plans in the U.S. increasingly use price mechanisms to steer demand for prescription drugs. The effectiveness of these incentives, however, depends both on physicians' price sensitivity and their knowledge of patient prices. We develop a moment inequality model that allows...

This study analyzes the effect of bicycle safety regulation in the United States and the United Kingdom using data on monthly injury rates. Unlike many previous studies of product safety regulation, a specific product regulation is analyzed, and long data series are available. In both countries,...

This paper summarizes four stylized facts about the prescription drug markets after patent expiration during the 80s: (i) generic firms entered the market at different points of time after patent expiration and they seldom exited; (ii) the brand-name price remained much higher than generic prices,...