A Modified Variable Returns to Scale Super - efficiency Model
نویسنده
چکیده
Traditional super-efficiency data envelopment analysis (DEA) models rank efficient units under the assumption of constant returns to scale (CRS). However, infeasibility may occur in super-efficiency models under variable returns to scale (VRS). This paper proposes a modified VRS super-efficiency DEA model to deal with infeasibility by relaxing the convexity constraint 1, 0 1 n j j j λ = ≠ = ∑ to 1, 0 1 n j j j d λ = ≠ = ≥ ∑ where d is not always equal to one, and the efficiency score of the evaluated DMU is redefined as a result. Moreover, it provides appropriate super-efficiency scores which can completely rank BCC efficient units. Numerical examples are used to illustrate the proposed procedures.
منابع مشابه
Application of Super Efficiency Analysis Investigating the Performance of Cold-Water Fish Producers in Rainbow Trout Farming Fields of Isfahan Province
Due to economic importance production of fish farms, in this research, the producers of cold water fish rainbow trout farms in the province in 2017 was evaluated using Super efficiency comprehensive analysis. In this regard, the information required to complete the questionnaire and paddy yield method based on a comprehensive analysis of the results obtained were compared with Super efficiency ...
متن کاملThe Economic Evaluation of Efficiency of Pomegranate Growers in Khash City
P omegranate product in Khash city causes this city enjoys a considerable advantage in terms of the production of this product. In this paper the performance of Khash township pomegranate producers was evaluated with a comprehensive analysis of supercharged performance. In this regard, the relevant information to complete the questionnaire in 2015 pomegranate growers in Khash city, w...
متن کاملMeasuring super-efficiency in DEA in the presence of infeasibility
Super-efficiency data envelopment analysis (DEA) model is obtained when a decision making unit (DMU) under evaluation is excluded from the reference set. Because of the possible infeasibility of super-efficiency DEA model, the use of super-efficiency DEA model has been restricted to the situations where constant returns to scale (CRS) are assumed. It is shown that one of the input-oriented and ...
متن کاملTwo-stage Production Systems under Variable Returns to Scale Technology: A DEA Approach
Data envelopment analysis (DEA) is a non-parametric approach for performance analysis of decision making units (DMUs) which uses a set of inputs to produce a set of outputs without the need to consider internal operations of each unit. In recent years, there have been various studies dealt with two-stage production systems, i.e. systems which consume some inputs in their first stage to produce ...
متن کاملCost Efficiency Evaluation via Data Envelopment Analysis Approach for Undesirable Outputs based on the Weak Disposability Axiom (Case Study: 56 Electricity Producing Thermal Power Plants in Iran)
Cost efficiency evaluation is a very important and applicable issue in Data Envelopment Analysis (DEA). In this paper, the classical cost efficiency model in which all the input prices are known and fixed for each decision making unit is developed via undesirable outputs with the weak disposability axiom. The proposed model is a nonlinear model under the variable returns to scale condition,...
متن کامل