Variables

Sample size

Mean

Standard deviation

Minimum

Median

Maximum

all sample

lnpatent

12530

1.9538

1.3804

0.0000

1.7918

8.8721

resass

10011

0.0213

0.0179

0.0001

0.0179

0.0979

suba

18399

0.0059

0.0083

0.0000

0.0030

0.0519

lnasset

20495

21.7702

1.2692

19.1781

21.6142

25.6517

cf

18990

−0.0044

0.1194

-0.5209

0.0143

0.2707

lev

20492

0.4509

0.2149

0.0454

0.4546

0.9069

roa

20495

0.0401

0.0555

-0.1744

0.0371

0.2087

cr1

20493

0.3604

0.1528

0.0894

0.3415

0.7540

eqb

20493

0.6347

0.5767

0.0190

0.4660

2.6383

lnage

24615

2.4955

0.5446

0.0000

2.6391

3.5835

ga

20495

0.2415

0.1760

0.0021

0.2060

0.7463

lndsrs

20491

2.3194

0.2822

1.3863

2.1972

3.5835

ddzb

20491

0.3749

0.0671

0.1333

0.3571

0.8000

tobinq

20121

2.2568

2.0424

0.2181

1.6468

11.6726

sale

20367

0.0640

0.0745

0.0000

0.0397

0.4123

central state-owned enterprises

lnpatent

1916

2.5249

1.6365

0.0000

2.3979

8.4163

resass

1195

0.0207

0.0189

0.0001

0.0165

0.0979

suba

2612

0.0057

0.0085

0.0000

0.0026

0.0519

local state-owned enterprises

lnpatent

3120

1.8221

1.4051

0.0000

1.6094

8.5601

resass

1904

0.0150

0.0155

0.0001

0.0112

0.0979

suba

5488

0.0054

0.0090

0.0000

0.0022

0.0519

private enterprises

lnpatent

6938

1.8619

1.2434

0.0000

1.7918

8.8721

resass

6533

0.0232

0.0178

0.0001

0.0194

0.0979

suba

9334

0.0063

0.0079

0.0000

0.0037

0.0519