Two-sided and Heterogeneous Effects of Environmental Regulation on the Technological Innovation Efficiency of Iron and Steel Enterprises in China
GE Zehui, SUN Xiaojie, GUO Zhiyuan
Journal of Resources and Ecology . 2024, (6): 1416 -1432 .  DOI: 10.5814/j.issn.1674-764x.2024.06.003