Do climate policies affect green patenting patterns?
研究了2000-2021年40个发达和新兴经济体及五个经济部门中气候变化政策对绿色专利产出的影响，发现政策促进绿色创新，尤其非市场型和技术支持政策效果更强，且在经济活跃期和融资约束小的部门更显著。
This paper investigates the effect of Climate Change Policies (CCPs) on green innovation, for a sample of 40 advanced and emerging market economies, and five economic sectors, during the period 2000–2021. Our results suggest that CCPs positively affect the production of green patents, with the effect intensifying gradually over time. The effect is larger for non-market-based and technology support policies—such as emission limits, feed-in tariffs and R&D subsidies—in countries with greater competitiveness and during periods of stronger economic activity—that is, higher GDP growth, lower uncertainty and financial stress. The results based on a difference-in-differences approach suggest that the positive effect of stricter CCPs on green innovation is stronger in sectors with limited financial constraints. • Climate Change Policies (CCPs) foster green innovation. • The effect is larger for non-market-based and technology-support climate policies, such as R&D subsidies. • The impact is amplified in periods of strong economic activity and in sectors with limited financial constraints.