Re: Negative binomial regression analysis: Different results in SPSS and STATA?

Posted by Ryan on Jan 26, 2014; 1:13am
URL: http://spssx-discussion.165.s1.nabble.com/Negative-binomial-regression-analysis-Different-results-in-SPSS-and-STATA-tp5724145p5724149.html

Dear ______,

There are many possibilities, including issues such as the N.B. parameterization, estimation method employed, test statistics, convergence criteria...

I know virtually nothing about STATA, so I cannot comment further. Many years ago I compared SAS and SPSS NB regression analyses on simulated data and have found very similar results. But, I made sure the same N.B. parameterization was being employed, test statistic, etc. before comparing results.

Ryan

On Sat, Jan 25, 2014 at 12:16 PM, Student073 <[hidden email]> wrote:

Hello everybody,

I run a negative binomial regression analysis using SPSS, and then did the
same in STATA. I used the default options, I guess, and got different
results in SPSS and in STATA.

For example, some of the coefficients are significant in SPSS (p<0.05), but
not in STATA.

Could anyone help me? Why could this happen? I've used the same dataset in
both cases...

Thanks a lot!




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