xddlovejiao1314 发表于 2016-6-18 17:36
你运行下sum命令,把结果贴上来呢~
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
delist | 160 .5 .5015699 0 1
size | 160 40.4545 67.50608 .31 333.08
mtb | 160 .89125 .9420203 .01 5.35
tobinq | 160 1.241312 1.139831 .04 7.32
cfc | 160 .061 .1887769 -.67 .89
-------------+--------------------------------------------------------
block | 160 27.72275 16.71239 2.67 73.82
leverage | 160 42.25888 20.14238 9.01 126.71
tax | 160 2.70825 3.275233 -5.13 19.85
roa | 160 9.079187 8.383155 -8.92 39.63
growth | 160 12.67319 17.89388 -44.16 70.18
-------------+--------------------------------------------------------
ac | 160 14.26713 15.86096 -13.03 154.58
lsef | 160 10.57113 7.615701 .79 46.63
liquidity | 160 .254625 .248836 -.41 .87
takeover | 160 .01875 .1360667 0 1
back | 160 .14375 .3519376 0 1
运行sum命令之后是这样的,您看是哪里有问题呢?