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Economy-wide Estimates of Rebound Effects: Evidence from Panel Data

Morakinyo O. Adetutu, Anthony J. Glass, and Thomas G. Weyman-Jones

Year: 2016
Volume: Volume 37
Number: Number 3
DOI: 10.5547/01956574.37.3.made
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Energy consumption and greenhouse emissions across many countries have increased overtime despite widespread energy efficiency improvements. One explanation offered in the literature is the rebound effect (RE), however there is a debate about its magnitude and the appropriate model for estimating it. Using a combined stochastic frontier analysis (SFA) and two-stage dynamic panel data approach, we explore these two issues of magnitude and model for 55 countries over the period 1980 to 2010. Our central estimates indicate that in the short-run, 100% energy efficiency improvement is followed by 90% rebound in energy consumption, but in the long-run it leads to a 136% decrease in energy consumption. Overall, our estimated cross-country RE magnitudes indicate the need to consider or account for RE when energy forecasts and policy measures are derived from potential energy efficiency savings.

Yardstick Regulation of Electricity Distribution – Disentangling Short-run and Long-run Inefficiencies

Subal C. Kumbhakar and Gudbrand Lien

Year: 2017
Volume: Volume 38
Number: Number 5
DOI: https://doi.org/10.5547/01956574.38.5.skum
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In this paper we estimate the short-run, long-run and overall efficiency of Norwegian electricity distribution companies for the period 2000-2013 controlling for both noise and company effects. Short-run inefficiency is the part of inefficiency that is allowed to adjust freely over time for each company, but long-run (persistent) inefficiency remains constant over time, although it is allowed to vary across companies. For robustness check we also consider two additional models in which either company effects are not controlled or these are treated as inefficiency. The production technology is represented by a translog input distance function in all three models. We find that technical change and returns to scale are quite robust across the models. However, the efficiency scores across the three models we consider are not correlated strongly. We conclude that the regulators and practitioners should take extra caution in using the proper model in practice, especially when the efficiency measures are used to reward/punish companies through incentives for better performance.

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