Based on the modi-fied production possibility set, a new version of DEA for dealing with these cases more extensively than the previous studies is proposed.

• 然后从生产可能集入手，将这种对要素的限制直接反映到生产可能集中。基于此改进后的生产可能集，提出了比现有研究更广泛意义的DEA模型。