| DID | PSM-DID | ||||
|---|---|---|---|---|---|
| (1) | (2) | (3) | (4) | ||
| DID | 0.073*** | 0.049*** | 0.073*** | 0.050*** | |
| (0.017) | (0.017) | (0.017) | (0.017) | ||
| _cons | -1.505*** | 1.044** | -1.511*** | 0.557 | |
| (0.005) | (0.425) | (0.005) | (0.430) | ||
| 控制变量 | NO | YES | NO | YES | |
| 个体固定 | YES | YES | YES | YES | |
| 年份固定 | YES | YES | YES | YES | |
| N/条 | 4448 | 4448 | 4201 | 4201 | |
| adj. R2 | 0.767 | 0.773 | 0.778 | 0.784 | |
