变量

观测值

均值

标准差

最小值

最大值

TQ

23,230

1.968

1.433

0.674

33.95

Lev

23,230

0.449

0.208

0.00710

0.995

ROE

23,230

0.0241

1.419

−176.4

2.324

age

23,230

2.851

0.354

2.303

3.434

patent

23,230

1.771

2.383

0

11.21

size

23,230

22.31

1.351

18.27

28.64

fix

23,230

0.228

0.173

0

0.971

RDS

16,399

17.80

1.687

5.094

25.03

Firstpct_

23,230

0.350

0.153

0.0287

0.900

ROA

23,230

0.0343

0.0751

−2.834

0.786

BM

23,230

0.645

0.252

0.0295

1.485