中文摘要：

应用C—D生产函数及计量分析法等探讨城市用地合理规模测算，采用偏离量及合理度分析城市用地规模扩张合理性，并以太仓市区为例进行案例研究。从总体看，太仓市城市用地规模偏高，但研究期后半时段城市用地规模扩张合理度有所提高。研究表明，采用计量模型及经济学分析法可对城市用地规模扩张的合理性进行度量；为提高城市用地规模扩张的合理性，应重视城市土地挖潜和土地生态服务价值，并建立健全相应的政绩考核制度。

英文摘要：

The paper discussed the measurement method of rational urban land scale by using C-D production function and methods of econometrics, and analyzed the rationality of urban land use scale expansion based on the indexes of deviation and rationality. Then, the paper took Taicang City as a case. Overall, the urban land scale during the study period was higher than the rational scale, but the urban land expanded much more rationally. The paper concluded that the rationality of urban land use expansion could be measured by using the methods of econometric models and economic analysis. In order to improve the rationality of urban land use scale expansion, attention should be paid to the improvement of land use efficiency and ecological service value of land, and the corresponding performance evaluation system also should be established and improved.