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st: missing t statistics


From   "Yun Liu" <liuyun3@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: missing t statistics
Date   Thu, 18 Oct 2007 21:20:40 -0400

Hi, Stata users,

I am running median regressions. Sometimes stata reports estimated
coefficients, standard errors and confidence intervals, but the t
statistics turn out to be missing. Could someone please tell me what
this means? Thank you! Below is an example:

qreg chgcomp swf swm swmcdftenure swfcdf* i.ind

Median regression                                    Number of obs =       528
  Raw sum of deviations 2.22e+07 (about 6806.4399)
  Min sum of deviations 1.74e+07                     Pseudo R2     =    0.2164

------------------------------------------------------------------------------
     chgcomp |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         swf |   44.91122   .0000596        .   0.000     44.91111    44.91134
         swm |  -1.589599   4.38e-06        .   0.000    -1.589608   -1.589591
swmcdftenure |   4.038524   8.44e-06        .   0.000     4.038507    4.038541
swfcdfCEOage |   .5402258   5.23e-06        .   0.000     .5402155    .5402361
   swfcdfbmv |  -64.76817   .0000999        .   0.000    -64.76837   -64.76797
  swfcdfrisk |   20.81125   .0000704        .   0.000     20.81112    20.81139
    _Iind_20 |  -462.8457   .1503787 -3077.87   0.000    -463.1412   -462.5502
    _Iind_22 |  -414.9953   .1383042 -3000.60   0.000     -415.267   -414.7235

Yun
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