Research Article
[Retracted] Measurement of Coordination Degree between Economy and Logistics in Hebei Province, China, Based on Fractional Grey Model (1, 1)
| | Primary indices | Secondary indices | Tertiary indices | Signs |
| | Logistics | Logistics demand | Cargo turnover (108 ton-km) | X1 | | Cargo throughput at coastal ports (108 tons) | X2 | | Total output of post and telecommunications (108 yuan) | X3 | | Logistics supply capacity | Highway mileage (km) | X4 | | Private car ownership (104 vehicles) | X5 | | Logistics sustainability | Fixed asset investment in transportation, warehousing, and postal services (108 yuan) | X6 | | Added value of transportation, warehousing, and postal services (108 yuan) | X7 |
| | Economy | Regional economic aggregate | Added value of tertiary industry (108 yuan) | Y1 | | Gross domestic product (GDP) (108 yuan) | Y2 | | Public budget revenue (108 yuan) | Y3 | | Regional social reproduction level | Social fixed asset investment (108 yuan) | Y4 | | Per capita disposable income of urban residents (104 yuan) | Y5 | | Regional economic benefits | Total import and export trade (108 yuan) | Y6 | | Total retail sales of social consumer goods (108 yuan) | Y7 |
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