This article generically identifies the economic criteria that determine market power and applies them to the provision of 800 service. Despite the comparatively late growth of competition, this market segment is currently capable of supporting effective competition. There is vigorous and...

A regulatory policy known as imputation has been recommended and applied in situations where a regulated firm with monopoly power over an essential input faces the threat of entry in one or more of its downstream markets. This policy generally imposes a price floor on the regulated firm's...

This paper examines the ability of entry by either resellers or facilities-based carriers to discipline the pricing behavior of a vertically integrated incumbent supplier. Theoretical considerations suggest that, once a sufficient amount of entry has occurred at both vertical...