RT Journal T1 Environmental Regulation,Market Power and Enterprise Innovation A1 CHEN Yi-li, DENG Yu-wei PB Journal of Guizhou University of Finance and Economics FD 2021-01-15 YR 2021 JF Journal of Guizhou University of Finance and Economics JO Journal of Guizhou University of Finance and Economics VO 39 IS 01 SP 30 DO K1 environmental regulation;market power;porter effect;R&D LK {https://gcxb.gufe.edu.cn/EN/article/article_9252.shtml}