Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: panel regression


From   "Lee Chuntao" <chtl@econ.hku.hk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: panel regression
Date   Mon, 18 Nov 2002 11:06:48 +0800

Dear Listers

       The following is a random effect panel regression output. I don't
know why sigma_u==0. because of this, i cannot run xthausman. can you help
me out?


thanks



.  xtreg invest l_tobinq cash nta, re

Random-effects GLS regression                   Number of obs      =
1680
Group variable (i) : stkcd                               Number of groups
=       280

R-sq:  within  = 0.0862                                  Obs per group: min
=         6
       between = 0.5242                                  avg =       6.0
       overall = 0.1601                                     max =         6

Random effects u_i ~ Gaussian                   Wald chi2(3)       =
319.48
corr(u_i, X)       = 0 (assumed)                Prob > chi2        =
0.0000

----------------------------------------------------------------------------
--
     invest |      Coef.   Std. Err.      z    P>|z|     [95% Conf.
Interval]
-------------+--------------------------------------------------------------
--
  l_tobinq |   .1258068   .0586902     2.14   0.032     .0107761    .2408374
      cash |   .1442353    .008403    17.16   0.000     .1277656     .160705
        nta |  -.1554083   .0710843    -2.19
0.029     -.294731   -.0160855
   _cons |   3.458639   1.513534     2.29   0.022     .4921665    6.425112
-------------+--------------------------------------------------------------
--
  sigma_u |          0
  sigma_e |  2.6171947
          rho |          0   (fraction of variance due to u_i)
----------------------------------------------------------------------------
--



*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index