Voice over Internet Protocol (VoIP) will transform many aspects of traditional telephony service including technology, the business models and the regulatory constructs that govern such service. This transformation is generating a host of technical, business, social and policy problems. The...

The paper examines a class of phenomena that combine adverse network effects with moral hazard, using the motor vehicle market as an example to develop and illustrate the key concepts. It is hypothesized that consumers behave as if there is a network externality with respect to vehicle size: the...

We present experimental results from a series of sessions organized using the Power Market simulator; a software designed to realistically replicate the Spanish Electricity Market. In the experiments reported here we compare the status quo to two alternative treatments which represent...

We discuss issues of the application of antitrust law and regulatory rules to network industries. In assessing the application of antitrust in network industries, we analyze a number of relevant features of network industries and the way in which antitrust law and regulatory rules can affect...

This paper develops and analyzes a model of competition between platforms in an industry with indirect network effects, with a specific focus on complementary product exclusivity. The objective is to understand the determinants of exclusivity and explore its effects on competition. We find that...

I examine interconnection decisions of differentiated firms. I find that previous results that firms never interconnect enough do not hold. In a Hotelling model consumers may suffer from interconnection, and firms may interconnect when it is not socially optimal. The firms interconnect too much...

When platforms compete for consumers, two types of consumer heterogeneity will matter: consumers value the presence of other consumers on a platform differently, and consumers contribute to the value of the platform differently. The optimal discriminatory pricing policy for platforms will depend...

Cellular telephony and associated data services has been a major social phenomena for well over a decade now. It has changed the way – in some countries more than others – in which people communicate. In many countries in Northern Europe and Asia, its penetration rates are very high and in...

We estimate a structural model of the market for automatic teller machines (ATMs) evaluate the implications of regulating ATM surcharges on ATM entry and consumer producer surplus. We estimate the model using data on firm and consumer locations, the parameters of the model by exploiting a source...

The US mobile phone industry has dramatically consolidated through mergers. We investigate whether a merger increases the performance of a combined carrier over the sum of its constituent parts. We first directly compare the quantities of post-merger carriers to those of their pre-merger...