Research on the mechanism of low-altitude economy’s impact on marine economy quality and development countermeasures―threshold effect based on green finance

An in-depth analysis of the relationship between the low-altitude economy and the marine economy is of great significance for accelerating the low-altitude economy’s empowerment of the marine economy’s qualitative development, cultivating new marine productive forces, and achieving high-quality development in the marine economy. This study examines China’s marine economy development from 2011 to 2023. Using the entropy method, it separately measures the quality of the marine economy and the comprehensive level of the low-altitude economy. Fixed-effects and threshold-effects models are used to verify the impact of the low-altitude economy on marine economy quality, as well as the threshold effects of technological innovation and green finance in this process. The results show that: (1)Marine economy quality exhibits a fluctuating upward trend, while the low-altitude economic development shows linear growth, though both demonstrate significant regional disparities; (2)Low-altitude economy development exerts a pronounced positive driving effect on marine economy quality, with notable regional heterogeneity; (3)Technological innovation exerts a non-linear impact on the high-quality development of marine economy enabled by low-altitude economy, featuring an initial promoting effect followed by diminishing marginal contribution; by contrast, green finance presents an opposite non-linear relationship marked by early restraining effects and subsequent facilitating effects. Consequently, efforts should focus on promoting the development of the low-altitude economy, enhancing technological innovation, deepening green finance reforms, and advancing coordinated top-level design to foster the coordinated development of the low-altitude and marine economies. JEL:O33, O47, L86