Fig. 3: Comparison of core explanatory variable coefficients in four sample regressions about industrial structure upgrading mechanism.
From: How does inter-provincial trade promote economic growth? Empirical evidence from Chinese provinces
This figure compares core explanatory variable (lntrade) coefficients under the Entirety, East, Middle, and West regressions in the empirical test of industrial structure upgrading mechanism. The vertical axis shows the magnitude, plus or minus of the coefficient of the core explanatory variables, and the value 0 is indicated by a dotted line as the cut-off point for positivity. The horizontal coordinate represents the four different groups, and we use four different colors here for easy observation. The four points are the values of the core explanatory variables in the corresponding four sets of regressions, and the confidence interval is 95%. Among them, the coefficient of core explanatory variables in the Entirety, East, and Middle is positive, while the coefficient of core explanatory variables in the West is negative. The four values in descending order are Middle, East, Entirety, and West. This reveals that the industrial structure upgrading, as an intermediary mechanism for inter-provincial trade to promote economic growth, is established in the overall, eastern, and middle regions, but not in western region.
