Re: st: Box-Tidwell Test

[Nick cox <njcoxstata@gmail.com>]

Here is another take. Consider adding the square of a 0-1 variable as  
an extra predictor to check linearity. But it's the same! Thus there  
is no progress this way.

Nick

On 26 Apr 2011, at 09:40, 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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