4.2.1. Total Sample Perspective
Based on the previous analysis, the first-order lagged term of the explanatory variable GEG was used as an instrumental variable to study the effect of forest resource endowment on GEG using a systematic GMM dynamic panel model, while the squared term of forest resource endowment was introduced in this study to verify the nonlinear relationship. The obtained estimation results are shown in
Table 7.
In
Table 7, the
p-value of AR (1) is 0.000, so the original hypothesis is rejected; the
p-value of AR (2) is 0.239, indicating that there is autocorrelation in the first-order difference of the perturbation term and no autocorrelation in the second-order difference of the perturbation term, which passes the serial autocorrelation check. The Sargan test result is equal to 0.996, for which the null hypothesis is not rejected; therefore, the instrumental variable setting chosen in this paper is acceptable, and the model does not have the problem of over-identification.
(1) The positive effect of GEG in the lagged period on GEG in the current period is significant, indicating that there is a clear transmission effect between the current green economic growth and the previous green economic growth. This means that the green economic growth that accumulated in the previous period will form a demonstration effect and a virtuous circle, constituting a continuous “green push effect”.
(2) The regression coefficient of forest resource endowment has a negative primary term and a positive quadratic term, indicating a U-shaped nonlinear relationship between forest resource endowment and regional GEG. In the initial stage of green economy development, the more abundant the forest resources are, the more green economic growth will be hindered, while when GEG exceeds the inflection point, the abundant forest resources will improve GEG. The economic benefits of forest resources can only be realized in a specific economic period. This is mainly because with the progress of technology, the improvement of living standards, and the change in people’s ideologies, forest resources’ inhibitive effect will gradually result in the creation of a forest resource gospel as the level of GEG increases.
(3) Forest resource endowment has a negative effect on regional GEG, and the significance and positive and negative signs between them do not change after gradually adding control variables; that this negative relationship remains significant demonstrates the strong robustness of the model. The results indicate that forest resource dependence has a significant hindering effect on GEG, which verifies that forest resource endowment inhibits green economic growth in the country, which verifies Hypothesis 1. The specific analysis is as follows:
Column 1 in
Table 6 presents the results from the analysis of the relationship between forest resource endowment and GEG without considering the influence of other factors, with the finding that the coefficient of forest resource endowment is −0.312, which indicates that there is indeed a significant inhibitive effect between forest resource endowment and GEG. Column 2 adds the human capital input level (HC) variable, and the forest resource endowment coefficient decreases to −0.257 with a significance level of 1%, indicating that the forest industry is a resource-intensive industry. Moreover, the concentration of human capital in the forest industry affects the human capital of other high-tech industries and crowds out the talent of other high-tech industries; thus, it cannot improve the green innovation level, and it is therefore understandable that the level of regional human capital input has a negative impact on GEG. Adding the environmental regulation variable in column 3, the absolute value of the coefficient of forest resource endowment continues to increase to −0.317 with a significance level of 1%, while the absolute value of the coefficient of human capital input level (HC) increases, indicating that environmental regulation has an impact on human capital input level, and both together lead to the aggravation of forest resource endowment’s inhibitive effect in the region. The forest resource endowment coefficient decreases to −0.309 with a significance level of 1% upon adding the FDI variable in column 4, indicating that increasing FDI can effectively mitigate forest resources’ inhibitive effect in the region. With the addition of the green finance variable in column 5, the forest resource endowment coefficient further decreases to −0.268 with a significance level of 1%, indicating that the addition of this variable reduces the inhibitive effect of forest resource endowment, and green finance can encourage enterprises to improve their production methods, change their energy consumption structure, and promote GEG.
4.2.2. Regional Heterogeneity Analysis
In this study, regression was conducted according to the national division of China’s regions to explore how forest resource endowment affects GEG in different regions based on the eastern, central, and western data. The results are shown in
Table 8 below.
(1) There is a significant positive effect of GEG in the lagging period on GEG in the current period in the different regions, indicating that GEG in China is sustainable.
(2) Except for the eastern region, the primary term of the regression coefficient of forest resource endowment is negative and the secondary term is positive, indicating that there is a U-shaped nonlinear relationship between forest resource endowment and GEG in different regions in central and western China, which verifies Hypothesis 2.
(3) The inhibitive effect of forest resource endowment is more significant in less economically developed regions, and there are large differences among different regions, while for more economically developed provinces, the inhibitive effect is more convergent; therefore, Hypothesis 2 is verified. The elasticity coefficient of the eastern region is positive but insignificant, indicating that forest resource endowment in the eastern region promotes GEG, but the effect is not too obvious, probably because industry in the eastern region tends to leap toward capital-intensive and technology-intensive operations, gradually easing the dependence on the resource endowment, and thus, the inhibitive effect of forest resource endowment does not appear; thus, it is beneficial and conducive to the improvement of GEG. In contrast, the inhibitive effect is larger in the central and western regions, probably because regional economic development is dependent on the development of forest resources and is over-reliant on resource industries, thus squeezing out investment in high-tech industries and tertiary industries. The over-exploitation and use of resources has caused a decline in GEG, but the elasticity coefficient in the central region is significantly lower than that in the western region.
(4) Human capital can significantly promote GEG in the east and has a significant negative effect on GEG in the central and western regions, probably because the eastern region has a more developed economy, a better business environment, and more development opportunities, which attracts a large amount of high-quality talent; meanwhile the central and western regions have a shortage of talent, on the one hand, and a lack of high-quality talent, on the other, and the existing labor force cannot meet the needs of enterprises. Therefore, to a certain extent, it affects the technological innovation and industrial structure upgrading of enterprises, which does not have a significant impact on regional GEG and, on the other hand, is not conducive to the improvement of GEG due to the crowding out of talent from resource industries to other industries.
The environmental regulations in the east and the central and western regions also show significant differences. Specifically, there is a significant inhibitory effect on GEG in the eastern region, while the effect on GEG in the central and western regions is also negative, but does not pass the significance level in testing. This may be due to the fact that the eastern region increases the cost burden of companies by investing heavily in pollution prevention and control, which may crowd out part of the investment in innovation, and companies are likely to be unable to upgrade their technology in a shorter period of time due to the reduction in R&D investment. Therefore, on balance, environmental regulations may not be conducive to achieving GEG in the short term.
FDI can significantly contribute to regional GEG in all three regions. The comparison reveals that the effect of FDI on GEG passes the significance level of 5% in the eastern region, while it is only significant at the 10% level for the central and western regions. This means that FDI has a stronger effect on GEG in the eastern region compared to the central and western regions. This may be because the infrastructure in the central and western regions is relatively undeveloped and cannot match the high-quality FDI absorbed, thus failing to generate effective technology spillover effects and have a stronger contribution to GEG.
The impact of green financial development on green economic growth in the eastern region is 0.478, indicating that green financial development in the eastern region can significantly contribute to green economic growth. The reasons for this are as follows: Firstly, in the eastern region, there is a relatively more developed economy and a better urban economic structure and industrial model, the benefits brought by green finance are obvious, the marginal output of input factors is higher, and the impact on green economic growth is significant. Secondly, the government, banks, and enterprises in the eastern region attach importance to green financial policies, and the government’s green financial implementation is stronger, strictly following a policy of imposing financial constraints on offending enterprises; moreover, enterprises can also respond consciously, pursuing green and low-carbon development of the economy while pursuing economic growth in a single approach and attaching importance to the coordinated development of economy and ecology. Green financial development in the central region fails to significantly promote green economic growth, with an impact coefficient of 0.322, and green finance in the western region fails to significantly promote green economic growth, with an impact coefficient of 0.092 that fails to pass the significance test, indicating that green financial development in the central and western regions has not yet been able to significantly promote green economic growth. This may be due to the following reasons: On the one hand, there is relatively little economic development in the central and western regions, resistance to adjusting the economic structure through the development of green finance is greater, and the effect is not obvious, so the impact on green economic growth is not significant; on the other hand, the central and western regions are mostly resource provinces, and the response to the green finance policy is insufficient, so a benign interaction between green finance and green economic growth has not been achieved.