Land Quality and Prices
研究发现美国各州土地价格差异近三分之二源于非农业用途，基于原始土地价格的土地质量指数存在偏差，并构建了排除非农业影响的质量指数。
Abstract Although land values reflect land quality, the quality characteristics that determine values are only partly related to agricultural uses. The results of estimating a reduced‐form equation explaining differences in land prices among states suggest that nearly two‐thirds of this variation is attributed to nonagricultural uses. Therefore, a land quality index based on raw land prices will be biased, which in turn will result in biased coefficients in a production function or its dual. A cross‐section land quality index which excludes the influence of nonagricultural uses is constructed.