| 变量名称 | (1) | (2) | (3) | (4) |
| Upgrade | Manage | Upgrade | RD | |
| Manage |
|
| 0.011*** |
|
|
|
|
| (60.42) |
|
| Treat × Time | 0.091*** | 6.430*** | 0.286*** | 0.017 |
|
| (8.30) | (4.99) | (9.16) | (0.33) |
| Constant | −2.482*** | −92.353*** | −1.468*** | −2.032*** |
|
| (−29.77) | (−29.08) | (−18.93) | (−5.13) |
| Control_Var | YES | YES | YES | YES |
| Observations | 17,242 | 17,242 | 17,242 | 17,242 |
| Adjusted R-squared | 0.740 | 0.112 | 0.785 | 0.164 |
| Sobel检验 | 0.071*** (z = 14.88) |
| ||
| Goodman检验1 | 0.071*** (z = 14.88) |
| ||
| Goodman检验2 | 0.071*** (z = 14.88) |
| ||
| 中介效应系数 | 0.071*** (z = 14.88) |
| ||
| 直接效应系数 | 0.021*** (z = 2.06) |
| ||
| 总效应系数 | 0.092*** (z = 8.30) |
| ||
| 中介效应比例 | 0.773 |
| ||