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st: AW: No Std. Err, t, P>|t| or Conf. Interval in Regression Result


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: No Std. Err, t, P>|t| or Conf. Interval in Regression Result
Date   Tue, 4 Aug 2009 13:10:18 +0200

<> 

What happens if you omit the - id_*- vars? Some of them are automatically
dropped, persumably due to multicollinearity...




HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Bianca Claassen
Gesendet: Dienstag, 4. August 2009 12:13
An: statalist@hsphsun2.harvard.edu
Betreff: st: No Std. Err, t, P>|t| or Conf. Interval in Regression Result

Hello,

I am trying to run regressions with my data but somehow it does give
me the coefficient but no result for Std. Err, t, P>|t| or Conf.
Interval.
See example below where:

delta_sic6 = between 0 and 1 (it's a percentage)
delta age, delta_quality and delta_rba are hedonic characteristics
(values between -100 and 100) which are multiplied by dummy variables
id_*

What am I doing wrong that is causing this problem and how do I solve it?

Thank you in advance.

Bianca

----------------------------------------------------------

reg delta_sic6  delta_age delta_quality delta_rba id_*, robust

Linear regression                                      Number of obs =
798
                                                       F(  0,     0) =
.
                                                       Prob > F      =
.
                                                       R-squared     =
1.0000
                                                       Root MSE      =
0

----------------------------------------------------------------------------
--
             |               Robust
  delta_sic6 |      Coef.   Std. Err.      t    P>|t|     [95% Conf.
Interval]
-------------+--------------------------------------------------------------
--
   delta_age |  -.0000587          .        .       .            .
.
delta_qual~y |  -.0186775          .        .       .            .
.
   delta_rba |   .0142273          .        .       .            .
.
      id_109 |  -.0749682          .        .       .            .
.
      id_110 |  -.0081043          .        .       .            .
.
      id_111 |  -.0358519          .        .       .            .
.
      id_112 |    .300693          .        .       .            .
.
      id_113 |  -.0222221          .        .       .            .
.
      id_114 |  -.0213012          .        .       .            .
.
      id_116 |    .079335          .        .       .            .
.
      id_117 |   .0213555          .        .       .            .
.
      id_118 |  (dropped)
      id_119 |  -.0012657          .        .       .            .
.
      id_120 |  -.0064438          .        .       .            .
.
      id_121 |   -.000078          .        .       .            .
.
      id_122 |  (dropped)
      id_123 |  (dropped)
      id_124 |   -.043714          .        .       .            .
.
      id_125 |   .0054831          .        .       .            .
.
      id_126 |   .0061213          .        .       .            .
.
      id_127 |  -.0099928          .        .       .            .
.
      id_128 |  (dropped)
      id_130 |   .0058896          .        .       .            .
.
      id_131 |   .0341311          .        .       .            .
.
      id_132 |  (dropped)
      id_133 |  -.1664293          .        .       .            .
.
      id_134 |  -.1653741          .        .       .            .
.
      id_135 |  -.1742016          .        .       .            .
.
      id_136 |   .0058644          .        .       .            .
.
      id_137 |  -.0024823          .        .       .            .
.
      id_138 |  -.0077241          .        .       .            .
.
      id_139 |  -.0080733          .        .       .            .
.
      id_140 |   .0030768          .        .       .            .
.
      id_141 |   .0066013          .        .       .            .
.
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