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st: help on the output of my regression


From   Jian Zhang <jzh@ucdavis.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: help on the output of my regression
Date   Tue, 19 Oct 2004 14:19:06 -0700 (PDT)

 Dear Stata users,

> I run a regression. but the results show that for some variables there are
> only the estimates; the standard errors and t-stat are dots. here is the
> result.
> ------------------------------------------------------------------------------
>      trqfill |      Coef.   Std. Err.      z    P>|z|     [95% Conf.
> Interval]
> -------------+----------------------------------------------------------------
>    ibaseadeq |  -.0000649          .        .       .            .
> .
>    obaseadeq |   .0000436   .0000144     3.03   0.002     .0000154
> .0000718
>         reg2 |  -.7753061          .        .       .            .
> .
>         reg3 |   .0897025   .1764089     0.51   0.611    -.2560526
> .4354576
>         reg4 |   .1975734   .1044786     1.89   0.059    -.0072009
> .4023477
>         reg5 |  -.7981209   .0852665    -9.36   0.000    -.9652401
> -.6310017
>         reg6 |  -.5694725    .081311    -7.00   0.000     -.728839
> -.4101059
>         reg8 |   .0085505   .1567197     0.05   0.956    -.2986144
> .3157153
>         reg9 |  -.2778602   .1279215    -2.17   0.030    -.5285816
> -.0271387
>         adc1 |   .7499405   .1172732     6.39   0.000     .5200894
> .9797917
>         adc3 |    4.01991   155546.6     0.00   1.000    -304861.6
> 304869.7
>         adc4 |  -.0662804   .0885973    -0.75   0.454     -.239928
> .1073672
>        usdkg |   .0009089   .0031272     0.29   0.771    -.0052204
> .0070381
>           ER |  -.0001415   .0000726    -1.95   0.051    -.0002838
> 8.24e-07
>        _cons |   1.208677   .0535968    22.55   0.000     1.103629
> 1.313724
> -------------+----------------------------------------------------------------
>     /sigma_u |   .6893885   .0264021    26.11   0.000     .6376414
> .7411356
>     /sigma_e |   .4345091   .0113336    38.34   0.000     .4122957
> .4567225
> -------------+----------------------------------------------------------------
>          rho |   .7156888   .0152034                      .6851716
> .744716
> ------------------------------------------------------------------------------
>
> another problem is that sometimes the standard errors are extremely large,
> for example, 2,000, and the p-value is almost 1. could you tell me why i
> could get these kinds of results and what is going on behind estimating ?
> thanks a lot!
>
> Jian Zhang
>
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