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Regional heterogeneity analysis.
| Effect | Eastern | Middle | Western |
|---|---|---|---|
| Direct effect | 0.027 (0.042) | 0.132 (0.135) | 0.142*** (0.027) |
| Spillover effect | 0.446*** (0.081) | 0.308** (0.159) | 0.271*** (0.061) |
| Total effect | 0.472** (0.095) | 0.440*** (0.132) | 0.414*** (0.068) |
| Control variables | YES | YES | YES |
| ρ | 0.425*** (0.073) | 0.389*** (0.081) | 0.623*** (0.062) |
| N | 198 | 144 | 198 |
| R2 | 0.221 | 0.383 | 0.315 |
| Log-L | 1306.767 | 1306.767 | 1306.767 |
*p <10 %, **p <5 %, and ***p <1 %.
