A vertically integrated firm that wholesales to its retail rivals can, if it has sufficient market power, set the margin between its retail and wholesale prices so as to harm its rivals. Conventionally, an imputation test is used to determine whether such behavior is being undertaken. Such tests...

This paper reviews the book "Cost Proxy Models and Telecommunications Policy"

The question of whether exclusive licensing of the right to provide harbour towage services in ports can provide a superior outcome to open competition has been among the questions that have recently preoccupied Australian policymakers. The purpose of this paper is to evaluate the arguments for...

The following is a transcription of my discussion of the papers (published in this issue) that were presented in the Panel on Competition Policy in Card-Based Payment Systems session of the Antitrust Activity in Card-Based Payment Systems: Causes and Consequences conference.

Time consistency refers to situations where a policy that is optimal ex ante proves not to be optimal ex post, creating the risk of opportunistic policy reversals. While the threat of such reversals has received widespread attention in the theoretical literature, testing whether policy is indeed...

Requiring developing countries to adopt competition laws has become a standard element in Free Trade Agreements between those countries and developed countries, and in the check list of measures sought by the World Bank and other multilateral institutions. However, there is little reason to...

Thirty years ago the world's carriers established a system of international payments which recognized their interdependence and the requirement to provide services jointly. The accounting rate arrangements, as then devised, met this need while creating incentives for capacity expansion and...