Land-Structures Substitution and the Urban Density Gradient
使用可变替代弹性模型，研究住房生产中土地与资本、劳动等投入的替代关系如何影响城市密度梯度，填补了该领域此前未被探讨的空白。
In the production of housing, builders use varying combinations of land and conventional inputs such as capital and labor. The importance of the elasticity of substitution among these inputs in shaping a developed area has been pointed out by various scholars, most forcefully by Muth (1969). Empirical estimates of elasticities have been made by Muth (1969, 1971), Koenker (1972) and Sirmans and Redman (1979). All but the last utilize CES specifications of the housing function. Recent developments in production function theory allow the use of more flexible forms, particularly those that do not assume the elasticity of substitution to be constant. One such specification is used by Sirmans et al. (1979). In this note we also use a variable elasticity of substitution model to investigate a problem which has not been addressed before and which can only be studied with a model of this type.