第四部分，指出了长沙市城市土地资源利用中存在的四个主要问题，并从经济学的角度分析了原因。
The fourth part, pointed out four main problems existing in the utilization of urban land resources in Changsha, and analyzed the reason in terms of economics.
城市地价空间结构是一个比较新的概念，而且城市地价空间结构的研究也是一个多学科的研究对象，它包含了土地经济学、城市经济学、城市地理学等很多学科的内容。
City land-value spatial structure is not only a new concept but also a research object that contains many subjects such as land economics, city economics and city geography.
城市土地资源具有明显的资产特性，属于经济资源，需要从经济学的角度来研究其最优利用。
Urban land resources, with obvious assets characteristic, is an economic resources, we should research the optimality use of urban land from the Angle of economics.
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