I have a hmework I gotta do for my Econometrics course in college. I am testing the Dobson's ( An Introduction to generalized Linear m.) examples of multinomial regresion ( nominal in chapter 8 ).

First I obtained the 300 individual cases of the Car preferences problem , then I run it in Minitab, SPSS and R.

I was surprised when I saw that only Minitab got the results as the book! However neither R or SPSS got them! Actually the last two obtained the same result. The difference is in the interception estimator.

I tried and read a lot of manuals of SPSS in order to get the correct estimation, but nothing so far!

i went like this -->Analyze--> Regresion --> Multinomial logistic

There I put my answer as the grade of importance with reference customized in 1 ( no or less difference) , the ages and sex were my factors.

I don't know if you could help me ....I really need those results!

Thanks in advance!