Tacit collusion is explored under a strategy in which, loosely speaking, firms match the lowest price set by any firm in the previous period. Conditions are provided under which this strategy supports collusive outcomes in a subgame perfect equilibrium. In contrast to traditional results, the...

We discuss policy towards mobile call termination, illustrated by the 2002 Competition Commission enquiry into the UK mobile market. We present a model of the mobile market which includes both fixed-to-mobile and mobile-to-mobile call termination. In broad terms, the former service is likely to...

This paper presents a model of a card payment system as a two-sided market that allows for partial participation by heterogeneous consumers and merchants. Taking into account the strategic effects arising from competition between merchants, the model is used to characterize the optimal structure...

A new class of access pricing problems is analyzed in which upstream firms compete for customers and access to these customers is required by downstream markets. Using fixed-to-cellular calls as an example, a model is presented which shows that the determination of cellular termination charges...

This thesis analyses three sets of issues that arise in the field of network economics.The first chapter following the introduction is concerned with modeling partial consumer participation in the context of two-way interconnection in telecommunications. Partial consumer participation is...