We consider competition among sellers when each of them sells a portfolio of distinct products to a buyer having limited slots. We study how bundling affects competition for slots. Under independent pricing, equilibrium often does not exist and hence the outcome is often inefficient. When...

This paper extends the theory of network competition between telecommunications operators by allowing receivers to derive a surplus from receiving calls (call externality) and to affect the volume of communications by hanging up (receiver sovereignty). We investigate the extent to which receiver...

We study a retail benchmarking approach to determine access prices for interconnected networks. Instead of considering fixed access charges as in the existing literature, we study access pricing rules that determine the access price that network i pays to network j as a linear function of the...

Electronic academic journal websites provide new services of text and/or data mining and linking, indispensable for e¢ cient allocation of attention among abun- dant sources of scienti?c information. Fully realizing the bene?t of these services requires interconnection among websites. Motivated...

In this paper we study, as in Jeon-Menicucci (2009), competition between sellers when each of them sells a portfolio of distinct products to a buyer having limited slots. This paper considers sequential pricing and complements our main paper (Jeon- Menicucci, 2009) that considers simultaneous...

Site licensing of e-journals has been revolutionizing the way academic information is distributed. However, many librarians are concerned about the possibility that publishers might abuse site licensing by practicing bundling. In this paper, we analyze the private and social incentives for the...

This paper considers a general and informationally efficient approach to determine the optimal access pricing rule for interconnected networks. It shows that there exists a simple rule that achieves the Ramsey outcome as the unique equilibrium when networks compete in linear prices without...

Recent decisions by the Spanish national competition authority (TDC) mandate payment systems to include only two costs when setting their domestic multilateral interchange fees (MIF): a fixed processing cost and a variable cost for the risk of fraud. This artificial lowering of MIFs will not...

We study the standard economic model of unilateral accidents, in its simplest form, assuming that the injurers have limited assets.We identify a second-best optimal rule that selects as due care the minimum of first-best care, and a level of care that takes into account the wealth of the...

The paper deals with a bilateral accident situation in which victims have heterogeneous costs of care. With perfect information,efficient care by the injurer raises with the victim's cost. When the injurer cannot observe at all the victim's type, and this fact can be verified by Courts,...