This note shows how the transmission system can enhance competition in price-regulated power industries, thus extending earlier findings reported in the literature for deregulated industries. In the context of a two-technology, price-regulated power industry, we show that the interconnection of two markets initially supplied by a different monopoly reduces market power and raises welfare. We
This paper analyses the foundations of “efficient-firm” regulation (implemented in Chile for almost two decades), and the formulas that are used to set the prices of water/sanitation companies, electric power distributors and the dominant phone companies. We show that efficient-firm regulation implies setting prices equal to long-run average cost, which is optimal when the firm