| 当期 | 未来一期 | 未来二期 | ||||||
| Patentt | Patentt | Patentt+1 | Patentt+1 | Patentt+2 | Patentt+2 | |||
Pledge_d | −0.066*** |
| −0.010*** |
| −0.009** |
| |||
| (−2.89) |
| (−3.17) |
| (−2.63) |
| |||
Pledge_r |
| −0.008*** |
| −0.006*** |
| −0.005*** | |||
|
| (−7.66) |
| (−4.84) |
| (−2.79) | |||
控制变量 | 控制 | 控制 | 控制 | 控制 | 控制 | 控制 | |||
Constant | 1.276*** | 1.603*** | 1.389*** | 1.807*** | 1.758*** | 1.959*** | |||
| (10.75) | (17.74) | (10.52) | (16.02) | (14.01) | (13.96) | |||
Adj.R2 | 0.191 | 0.181 | 0.170 | 0.151 | 0.149 | 0.142 | |||
F值 | 234.31*** | 168.12*** | 157.33** | 103.46*** | 106.59*** | 101.72*** | |||