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Re: st: Box-Tidwell Test


From   Steven Samuels <sjsamuels@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Box-Tidwell Test
Date   Tue, 26 Apr 2011 20:20:57 -0400

Student lisenger:

Out of curiosity: 


Do your data come from a survey sample?  If so, you might have to  -svyset- your data and use Stata's  survey commands.  Check the study documentation. Note that "STATA" is not correct spelling, but "Stata" is; see the last section of the FAQ:  



Steve
sjsamuels@gmail.com



On Apr 26, 2011, at 4:40 AM, lisenger@students.mail.uni-mannheim.de wrote:

Hi


Sorry for the vague explanations.

I want to check in how far being interested in a political scnadal and evaluating the scandal as an important problem, impacts the vote intentions of the people. My exampekl is the CDU- party finance scandal in Germany in 1999/2000.

My dependent variable is vote intention

1 = vote intention for CDU/CSU 0 = vote intention for other parties

Independent Variables:

subject orientation: 1 = interested in scandal 0 = not interested
problem orientation: 1 = scandal importatnt problem 0 = scandal not important


My logistic regression: logit voteUnion subject problem

My "not working" I mean that the Box-Tidwell test does not give any results. Normally below the regression, there would be columns with the results, yet in my case nothing


Iteration 0:  Deviance =  46385.51
Iteration 1:  Deviance =  46385.51 (change =         0)

[Total iterations: 0]

Box-Tidwell regression model

Logistic regression                               Number of obs   =      36278
                                                 LR chi2(2)      =     228.82
                                                 Prob > chi2     =     0.0000
Log likelihood = -23192.755                       Pseudo R2       =     0.0049

------------------------------------------------------------------------------
  wabsunion |      Coef.   Std. Err.      z    P>|z|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
     themen |  -.3546749   .0278373   -12.74   0.000     -.409235   -.3001148
    problem |  -.3162207   .0492572    -6.42   0.000    -.4127631   -.2196784
      _cons |  -.5600199   .0126023   -44.44   0.000    -.5847199   -.5353199
------------------------------------------------------------------------------
Deviance:46385.509.

.
Here are the results.

Thanks again for your reply.



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