Laffont and Tirole's Competition in Telecommunications : A View From the US

This article briefly reviews Competition in Telecommunications by Laffont andTirole (2000); it presents the major conclusions of the book and corrects certain errors. In addition, this article treats related topics, some specific to the US telecommunications industry. In US telecommunications access to incumbents facilities are priced based on cost model estimates. Several of the important sources of misunderstandings of telecommunications costs and cost estimates are described including: multiple meanings of 'access,'meanings of cross-subsidy; nature of loop costs; the many dimensions of marginal costs in telecommunications, misuses of long-run cost concepts; and misuses of 'most efficient' provider assumptions. The methods of cost calculations and legal and regulatory requirements in the US are described, as are the implications for incentive regulation, changing technology, efficient pricing, and measures of efficient competitive entry.