st: beta coefficients for interaction terms

[lschoele@rumms.uni-mannheim.de]

Hi Statalist,

I am working on a regression model with interactions between some  
variables. I read in a book, that I can't use the "normal"  
standardized beta coefficients for the interaction terms. They said  
that the interpretation of the beta coefficients is not possible until  
you z-standardise the interaction variables before you do the  
regression.

Does anyone know, if stata does the z-standardization for the  
interaction variables automatically, so I can use the normal  
standardized beta coefficients (shown in the stata output) for the  
interpretation?
I am using the 9.1 version of stata.

I hope someone can help me.

Best Lisa

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