|
| (1) | (2) |
|
| tfp | tfp |
| did | 0.0514* | 0.0380 |
| (12.74) | (5.56) | |
| ln_size | −0.0617 | −0.124 |
| (−2.09) | (−1.88) | |
| ln_staff | −0.181** | −0.185** |
| (−173.62) | (−76.53) | |
| ln_earning | 0.307 | 0.342 |
| (10.15) | (4.55) | |
| _cons | −3.823** | −3.169* |
| (−425.49) | (−22.70) | |
| 时间固定效应 | 是 | 是 |
| 个体固定效应 | 是 | 是 |