Table 1.
Statistical description of variables.
| Variable | Definition of the variable | Obs. | Mean | Std. Dev | Min | Max |
|---|---|---|---|---|---|---|
| Dependent variables | ||||||
| ln(CCOE) | ln (CCOE output) | 240 | 23.522 | 2.096 | 18.061 | 27.626 |
| ln(Man) | ln (output of other manufacturing sectors except for CCOE) | 240 | 26.876 | 0.916 | 24.410 | 28.621 |
| Independent variables | ||||||
| Treat | A dummy on whether a city is connected with HSR | 240 | 0.588 | 0.493 | 0 | 1 |
| ln(WDC) | ln (weighted degree centrality + 1) | 240 | 2.362 | 2.129 | 0 | 5.823 |
| Control variables | ||||||
| ln(Pop) | ln (city population) | 240 | 15.341 | 0.526 | 13.782 | 16.490 |
| ln(PGDP) | ln (GDP per capita) | 240 | 11.003 | 0.671 | 9.171 | 12.338 |
| ln(ST) | ln (finance expenditure for science and technology) | 240 | 20.709 | 1.337 | 16.075 | 24.255 |
| ln(HPV) | ln (highway passenger volume) | 240 | 18.500 | 0.727 | 17.020 | 20.351 |
| Airport | A dummy on whether there is at least one airport in a city | 240 | 0.563 | 0.497 | 0 | 1 |
| ln(Ter) | ln (tertiary industry output) | 240 | 25.451 | 1.034 | 23.357 | 28.307 |