Taking expanded land of Chang-zhu-tan agglomera- tions as the research objective, quantitative analysis of the economic benefits for land utilization from 2000 to 2010 with the typical mode of C2R in DEA was performed in this thesis, select- ing a certain input and output index with combination of current land utilization features of Chang-zhu-tan agglomerations, and studied the reasons for invalid years of DEA in this area. Propos- als of how to improve the economic benefits of expanded land i...