变量 | 模型1 | 模型2 | 模型3 | 模型4 | 模型5 | 模型6 |
lnINNO | 0.121*** | 0.111*** | 0.135*** | 0.134*** | 0.123*** | 0.126*** |
(7.71) | (6.93) | (8.33) | (8.22) | (7.48) | (7.05) | |
lnEMP | 0.0842* | 0.0929** | 0.0925** | 0.0805* | 0.0832* | |
(2.50) | (2.87) | (2.85) | (2.50) | (2.53) | ||
lnHC | −0.407*** | −0.415*** | −0.448*** | −0.440*** | ||
(−4.81) | (−4.71) | (−5.12) | (−4.93) | |||
lnROAD | 0.0258 | 0.0463 | 0.0483 | |||
(0.33) | (0.60) | (0.62) | ||||
lnOPEN | 0.0761** | 0.0769** | ||||
(2.97) | (2.99) | |||||
lnCL | −0.0221 | |||||
(−0.45) | ||||||
_Cons | 0.746*** | 0.553*** | 1.226*** | 1.257*** | 0.799*** | 0.850** |
(43.37) | (6.98) | (7.70) | (6.79) | (3.35) | (3.22) |