Abstract
In this paper, airline energy efficiency is divided into two stages: Operations Stage and Carbon Abatement Stage. This new two-stage operating framework is a modification of existing ones. Then the model, Network SBM with weak disposability, is presented to evaluate the efficiency of 22 international airlines from 2008 to 2012. The results show that: (1) Most airlines’ energy efficiencies have not declined in the period. (2) The average efficiency of European airlines is higher than that of non-European airlines. (3) Non-European airlines have smaller advancements in efficiency score than European airlines. (4) Most airlines’ efficiencies in Operations Stage are higher than Carbon Abatement Stage.
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