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.
| Types | Measure dimensions | Measure indexes | Symbols |
| Core explanatory variable | Industrial agglomeration level | Agglomeration level of the manufacturing industry | AGGL1 | Agglomeration level of the logistics industry | AGGL2 | Synergistic agglomeration level of manufacturing and logistics industries | AGGLCO |
| Other explanatory variable | Government intervention | General public budget expenditure of each city | InGOV | Social development level | Urbanization rate | SOCIAL | Industrial structure | Ratio of the output value of the secondary industry to local GDP | INSTRU | Opening to the outside world | Actual amount of foreign investment | InFOREIGN | Human resource level | Number of university students per 10,000 people | InEDU |
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