Research Article
Relationship between Urban Innovation Capability and Energy Utilization Efficiency: An Empirical Study of 281 Prefecture-Level Cities in China
Table 7
Estimated results based on DPTR.
| | | | Explained variable: | | | | Model 1 | Model 2 | Model 3 |
| | Threshold variable | | | Population density () | Industrial structure () | Environmental pollution () |
| | Threshold value | | | 263.9851 (13.3842) | 0.4026 (0.0004) | 36285.2104 (2190.5583) | | | Explanatory variable | Coefficient | | | |
| | Low | | | | | | | | | | 0.9086 (0.0019) | 0.9665 (0.0045) | 0.9794 (0.0046) | | | | | −0.0528 (0.0281) | −0.0029 (0.0007) | −0.0095 (0.0022) |
| | High | | | | | | | | | | −0.2038 (0.0201) | −0.0241 (0.0032) | −0.0408 (0.0068) | | | | | 0.0275 (0.0032) | 0.0044 (0.0007) | 0.0005 (0.0024) | | | Constant | | 0.5829 (0.0554) | −0.1812 (0.0069) | −0.1540 (0.0108) |
| | Nonlinear test (p value) | 0.00 | 0.00 | 0.00 |
| | Percentage of samples in high interval (%) | 65.27% | 59.84% | 56.71% |
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Note. , , and represent the significance levels at 1%, 5%, and 10%, respectively; standard error is presented in parentheses. |
