We study the regulation of a utility firm which is active in a competitive unregulated sector as well. If the firm … and quantity competition) and also optimal regulation. Accounting for the several effects of regulation on the unregulated … market, we show the existence of an informational externality, in that regulation provides useful information to the rival …

network available to other companies (local loop unbundling, or LLU). Entrants are then able to upgrade their individual lines … that over the course of time, many entrants have begun to take advantage of LLU. However, unbundling has little or no … technology (cable) which is not subject to regulation, and what we discover is that inter-platform competition has a positive …