存在非期望输入输出的多阶段系统效率评价模型

现有多阶段DEA模型的研究普遍假设所有输入、输出均为期望指标, 对存在非期望指标的情况研究较少, 尚无对最初投入和中间产出带有非期望指标的研究。为此, 本文首先提出了输入、输出类型的判定方法, 并将其应用于存在非期望输入、输出的两阶段系统。进一步针对存在非期望指标的两阶段生产系统中同种输入、输出, 尤其中间产出类型判定一致与不一致的情况, 构建了相应的生产可能集以及两阶段DEA模型, 最后利用本文方法和模型对我国上市银行效率进行了评价。

Efficiency Evaluation Models of Multi-stage System with Undesirable Inputs and Outputs

The existing multi-stage DEA models are generally assumed that all inputs and outputs are desirable, few studies on the undesirable inputs and outputs and no study on undesirable initial inputs and intermediate outputs. Therefore firstly the method of defining the types of inputs and outputs is proposed, and it is applied to the two-stage system which includes undesirable inputs and undesirable outputs. And for the conditions of consistent and inconsistent of the same inputs or outputs' types especially intermediate outputs' types in two-stage production system with undesirable indicators, corresponding production possibility sets and two-stage DEA models are established. Finally, the proposed methods and models are used to evaluate the efficiency of China's listed banks.