Research on the Differential Incomes of Industrial Land based on the Production Function——A Case Study of the Typical Enterprises in State-level Development Zones
利用国家级开发区企业数据，基于生产函数和边际生产力理论测算不同等级工业用地的边际收益，并与成本价和成交价比较，发现要素价格显著高于成本价，高等级地区成交价更接近要素价格。
Industrial land is the carrier of city economy.For a long time,the selling price of the industrial land is much lower than which of the commercial and residential land,which leads to the extensive use of industrial land.Considering this issue,the state council established a price floor of industrial land,which is known as a price,to restrain local governments from selling industrial land by a low or even zero price.And however,this paper estimated a priceof industrial land based on the production function and the marginal productivity theory of distribution.Using a data set of enterprises in state-level development zones,the marginal income brought by different land grade is measured in a model of production function and regarded as the differential incomes of land.And then,a factor price is calculated on the basis of the measured differential incomes.With a comparison between the factor price,cost price and deal price of industrial land,we find that:(1) the factor price is significantly higher than the cost price;(2)in areas with a higher land grade,the deal price is more proximal to the factor price.