This paper examines the usefulness of concentration indices in characterizing the degree of competition in the motion picture industry. It shows that concentration ratios and the Herfindahl-Hirschman index give a misleading picture of the degree of competition in the industry. All these indices...

Until 184, Federal regulation sanctioned monopoly as the primary mechanism for distributing natural gas. Pipelines were granted protected markets and permitted to acquire and distribute gas only through long-term contracts. To buy or sell gas, users and producers had to deal with the pipeline,...

This research seeks to determine the extent to which the Federal Energy Regulatory Commission's policy of "Open Access" to natural gas pipelines has created competition in natural gas markets. We argue that recently developed cointegration techniques are the natural way to evaluate competition...

We use graph theoretic methods to model arbitrage on the evolving topology of the natural gas pipeline network following pipeline deregulation. We estimate models of spot prices over the network and show that the emergence, evolution and performance of natural gas pipelines brought about by the...