在已有文献对两阶段合作模型的CCR效率研究的基础上,构建了基于BCC模型的几何平均合作效率模型,探讨了规模和技术因素对系统效率和不同阶段效率的影响.文章分别研究了对不同阶段最有利的效率评价模式,并得出该模式下不同阶段BCC效率的上下界,然后通过把某一阶段效率设为参数的方式,将非线性的几何平均合作效率模型转换为参数规划,并给出了具体的求解过程.文章还对第一阶段采用投入导向BCC效率、第二阶段采用产出导向BCC效率的几何平均合作效率模型进行了分析.
Based upon previous researches concerning about two-stage cooperative CCR efficiency, this paper proposes a two-stage BCC model for cooperative efficiency using a geometric mean method, and discusses the effects of scale and technical factors upon the efficiency of the system and the sub-stages. Several models are presented to calculate the efficiency of the sub-stages in a manner which is most preferable by one of the sub-stages, wherein the upper and lower bounds of the efficiencies are explicitly determined. A heuristic parametric linear programming is suggested to solve the cooperative model.