时空压缩下研发要素流动是否提升了区域绿色创新效率

基于地区高铁通勤时间构建空间权重矩阵，采用空间杜宾模型（SDM）和面板门槛模型（PTR）实证检验时空压缩下研发要素流动对区域绿色创新效率的影响。研究发现：高铁开通后，研发要素流动对绿色创新效率的促进作用显著增强，且研发人员流动的直接效应更显著；时空压缩下研发要素流动对绿色创新效率的影响存在地区异质性，东部地区因创新资源集聚程度和能力水平较高，更易从中获益，而西部地区受限于地理位置和经济发展阶段，其研发要素流动对绿色创新效率的影响偏弱；研发人员流动、财政科技支出、基础设施建设和市场化水平4种调节因素均表现出门槛特征，且呈现出梯度式增强。

Does the Flow of R&D Elements under the Compression of Time and Space Improve the Efficiency of Regional Green Innovation

The spatial weight matrix is constructed based on the commuting time of high-speed rail between regions. The spatial Dobbin model (SDM) and the panel threshold model (PTR) are used to empirically test the impact of R&D factor flow on regional green innovation efficiency under space-time compression. The results show that: after the opening of high-speed rail, the promotion effect of R&D factor flow on green innovation efficiency is significantly enhanced, and the direct effect of R&D personnel flow is greater; the influence of R&D factor flow on green innovation efficiency under the compression of time and space is regional heterogeneity, the eastern region is more likely to benefit from the higher degree and ability of innovation resources, while the western region is limited by geographical location In the stage of economic development, the influence of R&D factor flow on its green innovation efficiency is weak; the four moderating factors of R & D personnel flow, financial expenditure on science and technology, infrastructure construction and marketization level all show threshold characteristics and all show "gradient" enhancement.