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st: inteff afer logit


From   Sebastian Baumeister <[email protected]>
To   [email protected]
Subject   st: inteff afer logit
Date   Fri, 15 Dec 2006 14:31:35 +0100

I am trying to run inteff afer a logit model, which was used to fit a
discrete time survival model,  and i get the r(9) error message. Any advise
in what r(9) means and what might have caused r(9) to appear is highly
appreciated.

. logit event _d1 _d2 _d3 _d4 kont_exp sex expxsex, cluster(arzt) nolog
note: _d4 dropped due to collinearity

Logistic regression                               Number of obs   =       2844
                                                  Wald chi2(6)    =      84.24
                                                  Prob > chi2     =     0.0000
Log pseudolikelihood = -1046.9817                 Pseudo R2       =     0.0637

                                  (Std. Err. adjusted for 34 clusters in arzt)
------------------------------------------------------------------------------
             |               Robust
       event |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
         _d1 |   2.487836   .3662857     6.79   0.000     1.769929    3.205743
         _d2 |   2.284119     .36924     6.19   0.000     1.560422    3.007816
         _d3 |     1.7861   .3611189     4.95   0.000      1.07832     2.49388
    kont_exp |   .7616662   .2219238     3.43   0.001     .3267034    1.196629
         sex |   .5381819   .2434831     2.21   0.027     .0609637      1.0154
     expxsex |  -.5184373   .2895077    -1.79   0.073    -1.085862    .0489873
       _cons |  -4.454517   .4642658    -9.59   0.000    -5.364461   -3.544573
------------------------------------------------------------------------------

. inteff event _d1 _d2 _d3 _d4 kont_exp sex expxsex
r(9);


Thanks

Sebastian

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