变量代码

样本量

平均值

标准差

最小值

最大值

ROA

30,980

0.038

0.206

−14.586

20.788

Salary 2

30,362

0.018

0.148

0.000

12.313

Salary

30,362

0.081

0.105

0.000

3.509

Firmage

30,858

2.775

0.411

0.000

3.970

Staff

30,979

0.076

0.013

0.007

0.132

Duality

30,980

0.273

0.446

0.000

1.000

Boardnum

30,980

10.148

2.691

4.000

31.000

Inboardr

30,980

0.381

0.073

0.167

0.800

Tmtnum

30,980

0.072

0.028

0.010

0.430

Tenure

30,979

0.525

0.417

0.000

2.490

Boardnum

30,980

2.294

2.105

0.000

13.000

Hhi

30,979

3.436

1.506

0.029

8.999

Assetlr

30,980

0.452

1.162

−0.195

178.345

Private

30,980

0.963

0.122

0.078

1.000