Is Productivity Growth in Electricity Distribution Negative? An Empirical Analysis Using Ontario Data
用指数法和计量成本法估算2002-2012年安大略省73家配电企业的生产率增长，发现年均约-1%，与以往正增长结论相反，并检验了结果的稳健性。
Electricity industries are experiencing upward cost pressures in many parts of the world. This paper focuses on productivity trends in electricity distribution. We apply two methodologies for estimating productivity growth—an index based approach, and an econometric cost based approach—to data on 73 Ontario distributors for the period 2002 to 2012. The resulting productivity growth estimates are approximately -1% per year, suggesting a reversal of the positive estimates that have generally been reported in previous periods. We implement flexible semi-parametric specifications to assess the robustness of these conclusions and discuss the use of such statistical analyses for calibrating productivity and relative efficiency within a price-cap framework.