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 |