1 research outputs found
Environmental efficiency analysis based on relational two-stage DEA model
Data envelopment analysis (DEA) efficiency measures integrated with the environmental DEA
technology have gained popularity in environmental performance measurement of production
system including undesirable outputs. Most studies treat the production system as a black
box. This study measures the environmental performance considering the internal structure
of production system as a two-stage process. The first stage is characterized as the
production stage, and the second stage is the pollutant treatment stage. We extend the
relational model from the constant returns to scale framework to the variable returns to
scale version. The environmental efficiency of the entire two-stage production system for
each DMU is a product of the environmental efficiencies of both stages, and a heuristic
search is applied to the extended relational model. An example of industry system in some
Chinese provinces shows applicability of the proposed approach. Since the model can
effectively analyze a DMU’s environmental efficiencies for the overall system as well as
both sub-stages. It can imply more veracious decision-making information for environmental
management