Two Equilibriums and its Politic Implication in Urban Expansion
研究中国城市化中土地占用导致农业生产力下降和外部成本增加的问题，提出通过征收外部费用实现城乡土地竞争均衡和城市再开发与新区开发的平衡。
There is large number of land occupied in urbanization process of China. It is one of the most important factors to lead some food production forced on poor land, and to bring about enormous external cost. So the latter should be integrated into costs of urban expansion in order to improve agriculture competition to land and to get good equilibrium between urban and rural area. In addition, it should achieve a balance between urban land redevelopment and development, in which the added rent of marginal plot obtain the equal value between them. The charged external fees should be used to eliminate external diseconomy of agriculture production. Chinese land management should emphasis the integration of urban and rural area including urban renewal and new zones development. That is to say, if we do so, the part of added land value resulted from urban expansion can cover its social cost including infrastructure input, move input, land productivity improvement input and the input of eliminating the external diseconomy of agriculture production. Land-use of urban development and agricultural production will be placed in a quite fair competing environment and will achieve a better balance.