An application of Dynamic Range Adjusted Measure with weak-G disposability in evaluating airline energy efficiency

The dynamic energy efficiencies of airlines are measured in this paper. Greenhouse gas emissions are selected as the undesirable output, and the dynamic factor is defined as fleet size. Weak-G disposability is considered to reflect the material balance principle. A new model, the Dynamic Range Adjusted Measure (RAM) with weak-G disposability, is built to evaluate the dynamic energy efficiency of 29 international airlines during the year of 2011–2017. We find that Air Berlin, Scandinavian Airlines and Norwegian are efficient airlines and most airlines have an efficiency change of less than or equal to 1. Then we performed a sensitivity analysis for the annual weights and found that the results of equal weight are more reasonable.