Research Article

The Heterogeneous Effects of FDI and Foreign Trade on CO2 Emissions: Evidence from China

Figure 1

Quantile regression estimates with 95% confidence intervals for the effects of main influencing factors on carbon emissions. The trended lines represent quantile regression coefficients. The red dashed lines represent the corresponding OLS estimations.
(a) OLS and quantile regression estimates
(b) OLS and quantile regression estimates