|
| (1) | (2) | (3) | (4) |
| 变量 | TFP_LP | TFP_LP | TFP_LP | TFP_LP |
| Digit | 0.238*** | 0.205*** | 0.067*** | 0.085*** |
| (9.353) | (6.940) | (3.893) | (4.546) | |
| lnenter-age |
|
| −0.011*** | −0.010*** |
|
|
| (−7.848) | (−7.169) | |
| lnasset |
|
| 0.652*** | 0.653*** |
|
|
| (110.428) | (110.196) | |
| lev |
|
| 0.291*** | 0.287*** |
|
|
| (10.456) | (10.255) | |
| roa |
|
| 0.028*** | 0.028*** |
|
|
| (4.624) | (4.598) | |
| lnboar |
|
| −0.172*** | −0.176*** |
|
|
| (−4.699) | (−4.802) | |
| 常数项 | 8.000*** | 8.059*** | −5.741*** | −5.765*** |
| (151.249) | (133.460) | (−42.570) | (−42.736) | |
| 时间 | NO | YES | NO | YES |
| 个体 | NO | YES | NO | YES |
| N | 13,816 | 13,816 | 13,816 | 13,816 |
| R-Squared | 0.019 | 0.021 | 0.713 | 0.713 |