变量 | 模型1 | 模型2 | 模型3 | 模型4 | 模型5 | 模型6 |
lnτL | −0.0426*** | −0.0428*** | −0.0651*** | −0.0457*** | −0.0450*** | −0.0703*** |
(−8.93) | (−9.45) | (−10.40) | (−17.35) | (−13.01) | (−10.97) | |
lnτK | −0.0505*** | −0.0548*** | −0.0330*** | −0.0585*** | −0.0609*** | −0.0335*** |
(−8.82) | (−8.55) | (−4.53) | (−16.38) | (−13.27) | (−5.24) | |
lnτM | −0.0991*** | −0.1047*** | −0.1210*** | −0.1065*** | −0.1102*** | −0.1188*** |
(−20.05) | (−17.36) | (−19.76) | (−32.86) | (−28.10) | (−16.46) | |
position |
| −0.8336*** | −0.7739*** |
| −0.7120*** | −0.8061*** |
| (−8.30) | (−4.81) |
| (−11.29) | (−5.91) | |
position × lnτL |
|
| −0.6213*** |
|
| −0.5722*** |
|
| (−6.68) |
|
| (−6.62) | |
position × lnτK |
|
| 0.9546*** |
|
| 1.1431*** |
|
| (9.04) |
|
| (10.13) | |
position × lnτM |
|
| −0.3101*** |
|
| −0.3091*** |
|
| (−4.36) |
|
| (−3.46) | |
pow |
|
|
| 0.4534*** | 0.4251*** | 0.4883*** |
|
|
| −15.24 | −12.97 | −13.19 | |
fpa |
|
|
| 0.4330*** | 0.3314*** | 0.5043*** |
|
|
| −9.41 | −6.11 | −5.71 | |
ino |
|
|
| −0.1640** | −0.1604* | −0.1392 |
|
|
| (−2.60) | (−2.45) | (−1.83) | |
ins |
|
|
| −0.0076 | −0.0217 | −0.0216 |
|
|
| (−0.52) | (−1.53) | (−1.19) | |
行业固定效应 | 控制 | 控制 | 控制 | 控制 | 控制 | 控制 |
年份固定效应 | 控制 | 控制 | 控制 | 控制 | 控制 | 控制 |
常数项 | −0.0126 | 0.3604*** | −0.0163 | 0.0034 | 0 | 0.0423 |
(−0.47) | (7.22) | (−0.65) | (0.02) | − | (0.23) | |
Wald chi2(24) | 55333.85*** | 9699.84*** | 6040.21*** | 13731.90*** | 35055.76*** | 273355.29*** |