During the 1990s US healthcare markets underwent a significant transformation. Managed care rose to become the dominant form of insurance in the private sector. Also, a wave of hospital consolidation occurred. In 1990, the mean population-weighted hospital Herfindahl-Hirschman Index (HHI) in a...

Previous work has claimed that monopoly power facilitates the provision of credit, since monopolists are better able to enforce payment. Here, we argue that if relationship-specific investments are required by borrowers to establish creditworthiness, monopoly power may reduce credit provision...

We consider the effect of the regulation of telephony on Haan's [2001] analysis of the economics of free Internet access. Haan considers an unregulated market, and finds that free Internet access is compatible with an efficient outcome and avoids the double marginalization problem. We find that...

We show how rebates (or fidelity discounts) that take the form of lump-sum payments made to retailers can be used by an incumbent manufacturer to achieve exclusivity and to deter the entry of a more efficient rival. The results, which hold whatever the degree of differentiation between retailers...

Patent protection spurs innovation by raising the rewards for research, but it usually results in less desirable allocations after the innovation has been discovered. In effect, patents reward inventors with inefficient monopoly power. However, previous analysis of intellectual property has...

Anti-competitive mergers benefit competitors more than the merging firms. We show that such externalities reduce firms' incentives to merge (a hold-up mechanism). Firms delay merger proposals, thereby foregoing valuable profits and hoping other firms will merge instead - a war of attrition. The...

This paper considers price determination by monopolistic sellers who know the distribution of valuations among the potential buyers. We derive a novel condition under which the optimal price set by the monopolist is unique. In many settings, this condition is easy to interpret, and it is valid...

This paper studies a model where exclusive dealing (ED) can both promote investment and foreclose a more efficient supplier. While investment promotion is usually regarded as a pro-competitive effect of ED, our paper shows that it may be the very reason why a contract that forecloses a more...

This paper analyses the issue of parallel trade (arbitrage) for products protected by intellectual property rights. Many countries have traditionally allowed owners of intellectual property rights to prohibit arbitrage in the face of international price discrimination. In a well-known paper...