| 变量 | (1) lnCE | (2) lnCE | (3) lnCE | (4) lnCE |
| Dige | −0.702*** (0.099) | −0.644*** (0.103) |
|
|
| lnDige |
|
| 0.926*** (0.198) | 0.735*** (0.263) |
| (lnDige)2 |
|
| −1.526*** (0.132) | −1.515*** (0.204) |
| lnGDP |
| 0.250*** (0.086) |
| 0.239*** (0.081) |
| lnSTRU |
| 0.310*** (0.082) |
| 0.326*** (0.078) |
| lnFirst |
| −0.051 (0.086) |
| −0.211** (0.087) |
| HC |
| 1.755 (1.637) |
| −1.978 (1.695) |
| lnPOPU |
| 0.360** (0.178) |
| 0.539*** (0.172) |
| _cons | 1.575*** (0.038) | −0.667 (0.591) | 1.269*** (0.048) | −0.982* (0.564) |
| N | 310 | 310 | 310 | 310 |
| Province | Yes | Yes | Yes | Yes |
| Year | Yes | Yes | Yes | Yes |