A Soil‐Quality Index and Its Relationship to Efficiency and Productivity Growth Measures: Two Decompositions
调和了土壤质量指数与技术效率和生产率增长的经济概念，使用美国农业部实验田数据和数据包络分析估计土壤质量指数，并用回归分析探讨单个土壤质量属性的作用。
Abstract This article reconciles two notions of soil‐quality indexes with the economic concepts of technical efficiency and productivity growth. An example uses data from the U.S. Department of Agriculture's experimental fields in Maryland and data envelopment analysis techniques to estimate a soil‐quality index consistent with the notion of technical efficiency. Common regression techniques shed additional light on the role of individual soil‐quality properties in a very restricted linear approximation of the estimated soil‐quality index.