Re: st: prchange

[Rose Medeiros <rosem@cisunix.unh.edu>]

Andre,
-prchange- can give you some other ranges, specifically. 0 -> 1, from - 
0.5 to +0.5 standard deviations, and -0.5 to +0.5 of some specified 
value. For more idiosyncratic changes, e.g. ages 20 to 40, using 
-prchange- (also part of spost) , and a little arithmetic, you can 
calculate the change in the predicted probability as the independent 
variables changes from a -> b.
Best,
Rose

Andr� Paul wrote:


> Dear all,
>
> In the "spost" pakage by Long & Freese, the command "prchange" enables 
> us to measure the effect of discrete changes of the explanatory 
> variables.
>
> I have a question regarding this command:
> Suppose I want to estimate a multinomial logit model, with "age" as a 
> dependant variable, which ranges from 20 to 60. The "prchange" command 
> will give me the effect on the categorial variable when "age" varies 
> from 20 to 60 (If I got that right!).
> Is there a way to obtain this effect for different variations of the 
> variable? i.e if age varies from 20 to 40 and then from 40 to 60? I 
> didn't find the answer in the help file...
>
> Thanks,
> Andr�
>
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--
Rose Anne Medeiros
Department of Sociology / Family Research Laboratory
University of New Hampshire
126 Horton Social Science Center
20 College Road
Durham, NH 03824
U.S.A.

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