制造业

信息传输、软件和信息技术服务业

其它业

整个行业

互联网和相关服务业

软件和信息服务业

difi

0.0163

0.0331

0.4044**

0.0364*

0.0149

(1.28)

(1.63)

(2.84)

(1.68)

(0.88)

lqd

−0.0008**

−0.0004

−0.0076***

−0.0001

−0.0014*

(−2.51)

(−0.88)

(−4.06)

(−0.23)

(−1.92)

pftg

0.0010***

0.0007

−0.0040

0.0008

0.0010

(4.02)

(1.04)

(−0.66)

(0.94)

(1.25)

eqt

0.0281***

0.0258***

0.0154

0.0326***

0.0136*

(7.40)

(3.03)

(1.06)

(4.50)

(1.95)

pftm

1.0512***

1.1386***

1.4850***

1.0965***

1.1322***

(34.92)

(25.86)

(21.65)

(28.31)

(17.19)

_cons

−0.0393***

−0.0493***

−1.4917**

−0.0605***

−0.0266

(−4.58)

(−2.99)

(−2.82)

(−3.63)

(−1.56)

year

Yes

Yes

Yes

Yes

Yes

idv

Yes

Yes

Yes

Yes

Yes

N

2838

640

48

571

457

R2

0.7242

0.8261

0.8009

0.8422

0.7131