Abstract:
The opening of the residential UK electricity sector in 1999 motivated several studies of its impact on both the level and structure of retail charges, and on incumbents’ market power. Using regional observations on tariffs offered in January 2004, the present paper supports previous results about the responses of simulated retail charges from actual tariffs to distribution and transmission costs, customers density, the length of low voltage underground circuit, and show new. We investigate whether vertically integrated suppliers have a particular effect on charges ceteris paribus the effect of cost drivers and other suppliers’ specific factors.