| 模型 | (1) | (2) |
| 变量 | 老企业 | 年轻企业 |
| Imp | −0.0581*** | −0.0695 |
| (0.0041) | (0.1136) | |
| cf | −0.2954** | 0.0613 |
| (0.0281) | (0.6054) | |
| lev | 0.2089*** | −0.1752*** |
| (0.0001) | (0.0091) | |
| size | −0.0183*** | −0.0165 |
| (0.0011) | (0.1481) | |
| roa | 0.4182** | 0.5386*** |
| (0.0133) | (0.0064) | |
| ten_holding | 0.0030*** | 0.0024** |
| (0.0004) | (0.0205) | |
| _cons | 0.3135*** | 0.6437*** |
| (0.0051) | (0.0001) | |
| 年份固定 | Y | Y |
| 地域固定 | Y | Y |
| adj.R2 | 0.7982 | 0.6013 |