技术结构存在优化效应吗？——来自地区和产业层面的经验证据
董直庆, 焦翠红
Does the Optimization Effect of Technical Structure Exist？Empirical Evidence from Regions and Industries
DONG Zhi-qing, JIAO Cui-hong
华东师范大学学报(哲学社会科学版) . 2017, (2): 141 -154 .  DOI: 10.16382/j.cnki.1000-5579.2017.02.015