Table 10.
Robustness test results.
| Variables | Exclusion of singular values |
Replace explained variable |
||||
|---|---|---|---|---|---|---|
| DPP | IPP | EP | DPP | IPP | EP | |
| 0.0828∗∗ (0.0414) | 0.107∗∗∗ (0.0371) | 0.126∗ (0.0746) | 0.0958∗∗ (0.0423) | 0.0874∗∗ (0.0358) | 0.192∗∗ (0.0766) | |
| Control | Yes | Yes | Yes | Yes | Yes | Yes |
| Constant | −15.01∗∗∗ (3.851) | −15.38∗∗∗ (3.819) | −15.90∗∗∗ (3.886) | −13.15∗∗∗ (3.982) | −13.63∗∗∗ (3.979) | −14.42∗∗∗ (4.001) |
| Year | Yes | Yes | Yes | Yes | Yes | Yes |
| Province | Yes | Yes | Yes | Yes | Yes | Yes |
| Obs. | 300 | 300 | 300 | 300 | 300 | 300 |
| R2 | 0.877 | 0.879 | 0.877 | 0.867 | 0.867 | 0.867 |
Notes: t-statistics in parentheses. ∗∗∗p < 0.01. ∗∗p < 0.05. ∗p < 0.1.