“…The input–output model serves as the analytical foundation for HEM [ 30 ]. HEM has become one of the more popular empirical research paradigms in industrial linkage studies and is used in many fields [ 31 , 32 ]. HEM has been applied not only to analyze the impact of sectoral structural changes on the economy, but also in the areas of resources [ 33 ], energy and environmental protection [ 34 ].…”