Research Article

Synergistic Agglomeration of Manufacturing and Logistics Industries and Urban Green Economy Efficiency: Influence and Upgrading

Table 3

Influencing factors of the index system.

TypesMeasure dimensionsMeasure indexesSymbols

Core explanatory variableIndustrial agglomeration levelAgglomeration level of the manufacturing industryAGGL1
Agglomeration level of the logistics industryAGGL2
Synergistic agglomeration level of manufacturing and logistics industriesAGGLCO

Other explanatory variableGovernment interventionGeneral public budget expenditure of each cityInGOV
Social development levelUrbanization rateSOCIAL
Industrial structureRatio of the output value of the secondary industry to local GDPINSTRU
Opening to the outside worldActual amount of foreign investmentInFOREIGN
Human resource levelNumber of university students per 10,000 peopleInEDU