Re: st: SPOST prchange command for mlogit model

[Richard Williams <Richard.A.Williams.5@ND.Edu>]

At 09:49 AM 7/24/2006, David Quinn wrote:
> The problem is that "prchange" will not generate one standard deviation
> changes in probabilities for the dichotomous IVs.  I cannot seem to
> figure out how to do this.  Am I missing something, or is there an
> alternative method?  I need to be able to do this because I need to be
> able to compare the effects of all IVs using the same standard.  If I
> present one standard deviation probability changes for all ordinal and
> continuous IVs and min to max changes for the dichtomous IVs, the
> ranking of the relative effect of each IV does not coincide with what
> the standardized odds ratios are telling me.
What you want to do is generally frowned upon because it is 
impossible for a dichotomous IV to increase by 1 standard deviation.

Nonetheless, if you absolutely positively want to do it anyway, just 
change the coding of the dichotomy from 0-1 to 1-2.  (But don't let 
anybody know I told you that.  :) )


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Richard Williams, Notre Dame Dept of Sociology
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