| 门槛变量 | urb (1) | urb_w (2) | 门槛变量 | pgdp (3) | pgdp_w (4) |
|---|---|---|---|---|---|
| 门槛数 | 单一门槛 | 单一门槛 | 门槛数 | 单一门槛 | 双重门槛 |
| 0.0133*** | 0.0037 | 0.0174*** | 0.0033 | ||
| (0.0032) | (0.0026) | (0.0049) | (0.0041) | ||
| -0.0341** | 0.0013 | 0.0020 | 0.0024 | ||
| (0.0135) | (0.0054) | (0.0035) | (0.0026) | ||
| -0.0004 | |||||
| (0.0032) | |||||
| 0.0075* | 0.0049** | -0.0060 | -0.0010 | ||
| (0.0043) | (0.0022) | (0.0050) | (0.0033) | ||
| 0.0657*** | 0.0137** | 0.0168*** | 0.0050* | ||
| (0.0170) | (0.0064) | (0.0050) | (0.0027) | ||
| 0.0138*** | |||||
| (0.0037) | |||||
| 常数项 | 2.8991*** | 4.5570*** | 常数项 | 2.9723*** | 4.7127*** |
| (0.2590) | (0.1705) | (0.2712) | (0.1641) | ||
| R2 | 0.9287 | 0.9723 | R2 | 0.9287 | 0.9728 |