党的十八届五中全会提出绿色新发展理念后,地方政府在促进企业绿色转型过程中担负重要职责。基于2015-2021年中国A股上市公司数据,将绿色地方政府专项债(简称绿色专项债)发行信息与企业环境、社会和公司治理(Environmental,Social and G...党的十八届五中全会提出绿色新发展理念后,地方政府在促进企业绿色转型过程中担负重要职责。基于2015-2021年中国A股上市公司数据,将绿色地方政府专项债(简称绿色专项债)发行信息与企业环境、社会和公司治理(Environmental,Social and Governance,简称ESG)评分数据匹配,通过构建多时点双重差分模型实证检验发行绿色专项债对企业ESG评分的影响。研究发现,绿色专项债的发行显著提高了企业ESG评分,这一结论经过一系列稳健性检验后依然成立。进一步研究发现,该促进作用不仅通过提高企业绿色管理和绿色技术创新水平实现,还存在诱发企业“漂绿”自身报表的风险。此外,该促进作用在企业所处行业、所有制和所在地财政压力方面呈现出显著的异质性。基于上述结论,将地方政府专项债和绿色发展理念相联系、进一步推广绿色专项债,对发挥地方政府在环境治理中的作用和推动企业绿色转型具有重要意义。展开更多
Metasurfaces in the long wave infrared(LWIR)spectrum hold great potential for applications in ther-mal imaging,atmospheric remote sensing,and target identification,among others.In this study,we designed and experiment...Metasurfaces in the long wave infrared(LWIR)spectrum hold great potential for applications in ther-mal imaging,atmospheric remote sensing,and target identification,among others.In this study,we designed and experimentally demonstrated a 4 mm size,all-silicon metasurface metalens with large depth of focus opera-tional across a broadband range from 9µm to 11.5µm.The experimental results confirm effective focusing and imaging capabilities of the metalens in LWIR region,thus paving the way for practical LWIR applications of met-alens technology.展开更多
基金the National Key R&D Program of China(2021YFA0715500)the National Natural Science Foundation of China(NSFC)(12227901)+1 种基金the Shanghai Municipal Science and Technology Major Project(2019SHZDZX01)the Chinese Academy of Sciences President’s International Fellowship Initiative(2021PT0007)。
文摘党的十八届五中全会提出绿色新发展理念后,地方政府在促进企业绿色转型过程中担负重要职责。基于2015-2021年中国A股上市公司数据,将绿色地方政府专项债(简称绿色专项债)发行信息与企业环境、社会和公司治理(Environmental,Social and Governance,简称ESG)评分数据匹配,通过构建多时点双重差分模型实证检验发行绿色专项债对企业ESG评分的影响。研究发现,绿色专项债的发行显著提高了企业ESG评分,这一结论经过一系列稳健性检验后依然成立。进一步研究发现,该促进作用不仅通过提高企业绿色管理和绿色技术创新水平实现,还存在诱发企业“漂绿”自身报表的风险。此外,该促进作用在企业所处行业、所有制和所在地财政压力方面呈现出显著的异质性。基于上述结论,将地方政府专项债和绿色发展理念相联系、进一步推广绿色专项债,对发挥地方政府在环境治理中的作用和推动企业绿色转型具有重要意义。
基金Supported by National Key R&D Program of China(2021YFA0715500)National Natural Science Foundation of China(NSFC)(12227901)+1 种基金Strategic Priority Research Program(B)of the Chinese Academy of Sciences(XDB0580000)Chinese Academy of Sciences President's In-ternational Fellowship Initiative(2021PT0007).
文摘Metasurfaces in the long wave infrared(LWIR)spectrum hold great potential for applications in ther-mal imaging,atmospheric remote sensing,and target identification,among others.In this study,we designed and experimentally demonstrated a 4 mm size,all-silicon metasurface metalens with large depth of focus opera-tional across a broadband range from 9µm to 11.5µm.The experimental results confirm effective focusing and imaging capabilities of the metalens in LWIR region,thus paving the way for practical LWIR applications of met-alens technology.
基金Supported by the National Key R&D Program of China(2021YFA0715500)National Natural Science Foundation of China(NSFC)(12227901)Chinese Academy of Sciences President’s International Fellowship Initiative(2021PT0007)。