AUTHOR=He Xin , Tang Xinmeng , Liu Tengyuan , Kholaif Moustafa Mohamed Nazief Haggag Kotb TITLE=The competitive effect of heterogeneous subjects dominant environmental regulations on environmental quality and its asymmetric strategies JOURNAL=Frontiers in Environmental Science VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2025.1530560 DOI=10.3389/fenvs.2025.1530560 ISSN=2296-665X