| 变量 | (1) | (2) |
| Digital | GTI | |
| L.Digital | 0.474*** (17.81) |
|
| Digital |
| 1.094*** (5.67) |
| Con_s | 0.24*** (3.64) | −0.254 (−0.97) |
| Kleibergen-Paap rk LM |
| 125.48 |
| Kleibergen-Paap rk Wald F |
| 317.805 |
| Controls | YES | YES |
| Id Effect | YES | YES |
| Year Effect | YES | YES |
| R2 | 0.33 | 0.07 |