| 变量 | (1) | (2) | (3) |
| Gtfp | RD | Gtfp | |
| Power | −0.953*** | −0.026* | −0.935*** |
| (−2.956) | (−1.780) | (−2.903) | |
| RD |
|
| 0.594** |
|
|
| (1.994) | |
| First | −0.928*** | −0.143*** | −0.842** |
| (−2.721) | (−8.918) | (−2.470) | |
| Age | −0.394 | −0.182*** | −0.289 |
| (−1.197) | (−11.101) | (−0.866) | |
| Pattern | −0.957*** | −0.043*** | −0.934*** |
| (−2.889) | (−2.996) | (−2.826) | |
| Xjldx | 0.092 | 0.109*** | −0.057 |
| (0.382) | (7.742) | (−0.219) | |
| Asset | −1.299*** | −0.227*** | −1.155*** |
| (−4.040) | (−15.258) | (−3.585) | |
| Profit | −0.110 | −0.097*** | −0.014 |
| (−0.360) | (−3.747) | (−0.045) | |
| constant | −7.024*** | −0.121*** | −6.956*** |
| (−6.821) | (−3.609) | (−6.786) | |
| Year | Yes | Yes | Yes |
| N | 4182 | 4182 | 4182 |
| df_m | 12.000 | 12.000 | 13.000 |
| F | 4.512 | 47.359 | 4.246 |