Abstract
This paper deals with an extension of the conventional DEA formulations by taking into account the serial relationship of two-stage processes with stochastic data. The stochastic two-stage network DEA model is proposed based on centralized control organization mechanism. The stochastic two-stage network DEA model is converted into a deterministic linear programming model under the assumption that components of inputs, outputs and intermediate products are related with some basic stochastic factors. Stochastic efficiency analysis including the relationships of the whole process and the two sub-processes are then discussed. In addition, an example of 16 commercial banks in China is used to calculate the efficiencies under different levels by applying the proposed model.
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