数据包络模型与规模收益分析

DATA ENVELOPMENT MODEL AND RETURNS TO SCALE

本文较为详尽地讨论了引起DEA模型最优解不唯一性的原因,从而指出了文(1)方法用于判断DMU的规模收益情况时有时失效的关键所在。同时,本文还提出了相应的修改方法,使文(1)方法能重新被运用。

This paper discusses the factor for causing multiple optima in DEA model. It is shown that the approach for determination of the returns to scale, which is developed by Banker (1984), may fail to work. Meanwhile, a remedy is provided to make the approach work again.