英文文献：Griliches' K-Shift And Competitiveness: Commodity Progress In Us Agriculture-格里切斯的《k -转移和竞争力:美国农业的大宗商品进步》(K-Shift And Competitiveness: the Commodity Progress In Us Agriculture)
英文文献作者：Fulginiti, Lilyan E.
英文文献摘要：
Competitiveness in commodity markets is associated with a shift in the marginal cost as represented by Griliches k-shift. A distance function is used to estimate this shift as a combination of the rate an bias of technological change in the markets for corn, soybenas, wheat, and beef in U.S agriculture.

商品市场的竞争力与边际成本的变化有关，用Griliches k-shift表示。距离函数被用来估计这种变化，它是美国农业中玉米、大豆、小麦和牛肉市场的技术变化偏差率的组合。