| 变量 | GTI | GTI | GTI | GTI |
| (1) | (2) | (3) | (4) | |
| treat × post | -0.291*** (0.101) | -0.316*** (0.104) | -2.272** (1.004) | -2.451** (1.519) |
| Sub × treat |
|
| -0.0227* (0.0121) | -0.0303** (0.0136) |
| Sub × treat × post |
|
| 0.148** (0.0629) | 0.164** (0.0679) |
| Sub × post |
|
| -0.131*** (0.0711) | -0.137* (0.0789) |
| Sub |
|
| 0.188*** (0.0464) | 0.120** (0.0524) |
| Growth |
| 0.174 (0.131) |
| 0.210 (0.135) |
| Lev |
| -0.0248 (0.241) |
| -0.0361 (0.242) |
| Ros |
| -0.688*** (0.247) |
| -0.651*** (0.251) |
| size |
| 0.300*** (0.0595) |
| 0.205*** (0.0662) |
| age |
| -0.201*** (0.0496) |
| -0.152*** (0.0478) |
| TobinQ |
| 0.132*** (0.0372) |
| 0.108*** (0.0359) |
| 企业 | 控制 | 控制 | 控制 | 控制 |
| 年度 | 控制 | 控制 | 控制 | 控制 |
| 样本量 | 4400 | 4400 | 4400 | 4400 |
| 调整R2 | 0.004 | 0.034 | 0.022 | 0.035 |