At 10:10 AM 9/5/2005, Little, Allan wrote:
Dear all,
I'm trying to calculate predicted probabilities following a
multinomial logit regression. My dependant variable has three states
- employment (coded 0), unemployment (1) and inactivity (2).
I would like to calculate the predicted probability, firstly
evaluated at the mean, and secondly evaluated a number of different
specified values. However, I am encountering some apparent
inconsistencies according to which command I use.
1. If I use 'predict p0 p1 p2 if e(sample)' [option 'pr' is assumed
to be the default]. The predicted probabilities are equivalent to
the proportion (sample mean) for each category.
Perhaps some output or at least the actual commands would help. Are
you saying that, for every case, the predicted probabilities are the
same for each category? I'm not totally clear on what you are doing,
since predict is going to give you values for individual cases
whereas prvalue gives you a few summary statistics.
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
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