Projection pursuit regression and disaggregate productivity effects: the case of the Indian blast furnaces
使用投影寻踪回归方法，将印度高炉的生产过程与利用过程分解，发现提高煤炭质量能显著提升生产率，而管理人员的培训有正面效应，生产工人的培训则有负面效应。
Abstract Productivity of blast furnaces in India is studied by disaggregating the production process and the utilization process. A dimension‐reducing nonparametric approach—projection pursuit regression—is used. We find that productivity can be increased significantly by improving the quality of coal. There is no evidence that executives have a positive marginal product. The production workers have a negative marginal product for the production process and a positive one for the utilization process. But the training of executives has a positive effect whereas that of the production workers has a negative effect on productivity. Copyright © 2004 John Wiley & Sons, Ltd.