Last week, I had the pleasure of being part of the Second Annual Searle Center Conference on Federalism and Energy in the United States.  (I had the good fortune to be part of the first one, too.)  The conference covered a wide range of energy issues from electricity transmission siting to hydraulic fracturing to natural gas markets.  One paper/presentation struck me as particularly interesting for markets generally (I am told an update version will be available soon at the same site: “The Evolution of the Market for Wholesale Power” by Daniel F. Spulber, Kellogg School of Management, Elinor Hobbs Distinguished Professor of International Business and Professor of Management Strategy & R. Andrew Butters, Kellogg School of Management, Northwestern University.

Here is the conclusion: 

A national market for wholesale electric power in the US has emerged following industry restructuring in 2000. Tests for correlation and Granger Causality between trading hubs support the presence of a national market. Going beyond pairwise analysis, we introduce an array of multivariate techniques capable of addressing the national market hypothesis, including the common trend test. Although there is strong evidence of integration between the series, the analysis suggests a division between the eastern and western parts of the

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