模型1

模型2

系数

t值

P值

系数

t值

P值

常数项

28.3774

0.3891

0.6972

29.1717

0.4002

0.6890

Ln(NI_t-1)

0.1004***

14.6858

0.0000

0.1005***

14.7053

0.0000

Ownership*Ln(NI_t-1)

−0.0350***

−4.0071

0.0001

Stateowned*Ln(NI_t-1)

−0.0678***

−5.5513

0.0000

Countyowned*Ln(NI_t-1)

−0.0187

−1.9204

0.0548

LnSize

0.1299***

14.2537

0.0000

0.1299***

14.2629

0.0000

Lev

0.0008

0.3337

0.7386

0.0009

0.3635

0.7162

Board

−5.5934

−0.4257

0.6703

−5.7638

−0.4389

0.6607

Indd

3.6772

0.2799

0.7796

3.9192

0.2985

0.7653

Lsh

−0.8795

−18.852

0.0731

−0.6283**

−15.0045

0.0174

Dual

1.6647

1.1466

0.2516

1.6503

1.1373

0.2554