变量名 | 统计量 | 均值 | 方差 | 最小值 | 中位数 | 最大值 |
lnrd | 3310 | 5.682 | 1.145 | 0.000 | 5.697 | 9.933 |
rd_rev | 3310 | 5.593 | 4.884 | 0.000 | 4.380 | 76.350 |
vc | 3310 | 0.421 | 0.494 | 0.000 | 0.000 | 1.000 |
vc_r | 3310 | 0.936 | 2.598 | 0.000 | 0.000 | 35.480 |
soe | 3310 | 0.220 | 0.414 | 0.000 | 0.000 | 1.000 |
size | 3310 | 22.133 | 1.103 | 19.735 | 22.020 | 26.372 |
age | 3310 | 2.924 | 0.267 | 2.197 | 2.944 | 3.555 |
lev | 3310 | 0.376 | 0.175 | 0.055 | 0.375 | 0.902 |
cash | 3310 | 0.057 | 0.060 | −0.194 | 0.054 | 0.258 |
roe | 3310 | 0.074 | 0.110 | −1.112 | 0.072 | 0.442 |
top1 | 3310 | 0.322 | 0.138 | 0.084 | 0.306 | 0.732 |
board | 3310 | 8.340 | 1.495 | 0.000 | 9.000 | 15.000 |
ddr | 3310 | 3.104 | 0.491 | 0.000 | 3.000 | 7.000 |
dual | 3310 | 0.309 | 0.462 | 0.000 | 0.000 | 1.000 |
SAabs | 3310 | 3.843 | 0.219 | 2.935 | 3.835 | 5.278 |
KZ | 3310 | 2.005 | 1.324 | 0.000 | 1.693 | 22.572 |