区域绿色技术溢出与技术创新门槛效应研究--以京津冀及长三角地区为例
구역록색기술일출여기술창신문함효응연구--이경진기급장삼각지구위례
Research on Regional Green Technology Spillover Effects and Threshold Effect of Innovation:Based on Beijing-Tianjin-Hebei and Yangtze River Delta Area
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