Variable | Name | Measurement and assignment | Mean | Min | Max |
Openness to the outside world |
| Total import and export volume is higher than the total GDP of the provinces and cities | 0.317 | 0.032 | 1.698 |
Human capital |
| The number of students in the school of ordinary institutions of higher learning than the resident population/per 100,000 | 1521.8 | 277.58 | 3489.75 |
Regional protectionism |
| Local government expenditure share of GDP per year | 0.402 | 0.0073 | 2.67 |
Infrastructure level |
| Highway mileage is higher than the provincial area | 0.700 | 0.032 | 2.438 |
Domestic market potential |
| Domestic market potential indicator | 352.41 | 10.75 | 2117.1 |
Distance from the port |
| Distance from the nearest port of the provincial capital city/km | 616.91 | 14.97 | 2482 |