3. Efficiency evaluation: three-stage dea model The traditional dea model was first proposed by Charnes et al. It uses statistical data envelopment analysis method to evaluate the efficiency of multiple inputs and multiple outputs. Specifically, the decision-making unit is projected onto. 2.3.2 Two-stage correlation DEA model Considering the shortcomings of the two-stage independent DEA model, scholars have proposed a two-stage correlation DEA model. Like the two-stage independent dea model, the two-stage dependent dea model divides the business process into two stages, but. Result analysis: As can be seen from the above table, cities 2, 8, 9, and 10 have achieved strong dea efficiency (slack variables are all 0), which shows that full utilization of resources has been achieved, which is a Pareto optimal state. The remaining decision-making units are not dea effective and need to be reduced.
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The Dea model can be subdivided into three types: (1) ccr model: This model assumes constant returns to scale and is mainly used to measure technical efficiency;
