Comparative Analysis of Production Possibility Frontier in Measuring Eco-efficiency with DEA: an Application to Airport

摘要

The environmental sustainability is an important issue in airports. Under this background, there are many researches on airport efficiency analysis including undesirable outputs and on evaluating productivity with respect to environmental factors. However, no study has provided analyses on production possibility frontiers in measuring the eco-efficiency with including undesirable outputs. Almost all researches on eco-efficiency analysis with DEA have been using one of two types of production possibility frontier with mentions on their limitation. In the efficiency analysis models with the undesirable outputs in the airports, there are used mainly two types of production possibility frontiers. The first one is the frontier based on the Shephard technology, which involves a weak-disposability concept using a single abatement factor. The second one is the frontier on the Lozano-Gutterrez technology, which tries to take the weak disposability into account by regarding the undesirable outputs as the input. In this paper, we shows that these two concepts have limitation in making the production possibility area. To overcome this limitation, we propose an undesirable-output model using multiple abatement factors based on weak disposability with the SBM(slack-based measure) approach. With Korea's 13 domestic airport data, we analyze comparatively the different eco-efficiency performances among the three approaches in estimating production possibility frontier, such as Shepard's model, the Lozano-Gutierrez's model and our proposing model.