请教为何EVIEW和EXCEL,STATA回归结果不同,非常急,谢谢!

我用的是简单的时间序列

y x1 x2 x3 x4
.12 6.9776 .0055 .2789 .0143
.07 7.09 .0064 .2944 .0156
.1 7.1589 .0073 .3063 .0167
.1 7.2521 .0081 .2978 .0158
.03 7.3435 .0078 .2502 .0151
.02 7.3686 .0091 .2311 .0145
.08 7.3916 .0109 .2479 .013
.13 7.4666 .0235 .289 .0116
.13 7.5879 .046 .3329 .0115
.12 7.7075 .0623 .3027 .0112
.1 7.8194 .0536 .2886 .0106
.09 7.9123 .0508 .2854 .0105
.08 7.9972 .0501 .2886 .0101
.07 8.0761 .0471 .3092 .0092
.06 8.1422 .0365 .2903 .0082
.08 8.203 .0332 .2886 .0076
.08 8.2761 .0348 .2964 .007
.08 8.3489 .0356 .3172 .0065
.09 8.4295 .0314 .3593 .006
.09 8.5188 .0355 .4606 .0059
.1 8.6091 .0324 .4517 .0059
用EXCEL和STATA回归,得到很好的结果,符号和significant都很好,但没有输出DW值

而用EVIEW回归后,结果相差很大,X4系数由正变成负, P value也很不同,有DW值

请问一下这是什么原因啊????

再请教一下Stata中想算DW值,先用tsset 命令,格式如何啊,无论我怎么尝试都说命令不对!

谢谢大家的帮助!!!