The relationship between air traffic delays and competition has received much attention recently. I estimate the price responses to longer flight delays in competitive and non-competitive markets, using a policy change to instrument for potentially endogenous flight delays in the price...

We explore the logic of predation and rules designed to prevent it in markets subject to network effects. Although, as many have informally argued, predatory behavior is plausibly more likely to succeed in such markets, we find that it is particularly hard to intervene in network markets in ways...

We study the strategic choice of compatibility between two initially incompatible network goods in a two-stage game played by an incumbent and an entrant firm. Compatibility may be achieved by means of a converter. We derive a number of results under different assumptions about the nature of the...

To understand how consolidation impacts quality provision, I estimate demand and supply of the signal quality of wireless telephony using a proprietary survey and a unique database of antenna facilities, or base stations. Using local land use regulation as an instrument, I find a 1% increase in...

The Internet provides media firms with an unparalleled opportunity to target advertising towards their consumers. This paper considers how targeted advertising affects different media markets. I show that media firm profits rise and advertising prices rise the most with the ability to target...

This paper explores a dynamic model of product innovation, extending the work of Dutta, Lach and Rustichini (1995). It is shown that if R&D costs for quality improvements are low, the dynamic competition is structured as a race for being the pioneer firm with payoff equalization in equilibrium,...

This paper explores a dynamic model of product innovation, extending the work of Dutta, Lach and Rustichini (1995). It is shown that if R&D costs for quality improvements are low, the dynamic competition is structured as a race for being the pioneer firm with payoff equalization in equilibrium,...

An incumbent monopolist is uncertain about its linear demand, but can acquire information at a cost. We determine how an entry threat affects the firm's information acquisition. This effect depends on what the entrant observes about the incumbent's information choice. We consider all four...

Health care markets fail to satisfy many requirements for perfect competition, including large numbers of consumers and firms, zero search costs, and marketability of all goods and services. Over time, health care markets have evolved to overcome the resulting inefficiencies. We combine the...

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...