Analyzing the Mediation Effect in a Multi-Equation System: Independent and Chained Pathways

Equations (2)-(4) comprise a system of multiple equations. The mediating effect encompasses two distinct pathways: the independent mediation effect and the chained mediation effect. The former pathway entails the causal chain of 'intelligent development→income structure adjustment→alleviation of human capital misallocation' and 'intelligence development→human capital flow→alleviation of human capital misallocation'. The latter pathway involves the causal chain of 'intelligent development→income structure adjustment→human capital flow→alleviation of human capital misallocation'.