Vertical integration and the restructuring of the U.S. electricity industry

Debates on restructuring of the U.S. electricity industry are often about the degree to which market relationships should replace transactions that formerly took place within regulated, vertically integrated utilities. Markets for the purchase of energy by vertically unintegrated distribution utilities are clearly feasible, but vertical deintegration of existing systems may entail foregoing some operational and reliability benefits that are important in light of electricity’s unique characteristics. Research and policy on restructuring have almost totally disregarded a large econometric literature on the savings from vertical integration. At the same time, policymakers have accepted the results of flawed studies that purport to estimate the benefits of switching to a market regime. A review of California’s restructuring history shows that vertical integration was viewed primarily as a tool that incumbent utilities might use to perpetuate their market power. The disregard of its benefits led to questionable divestitures that produced superficially competitive market structures, and to the institution of Independent System Operators whose costs have yet to be compared to their benefits