st: collecting interaction terms after estimation

[Maria Ana Vitorino <vitorino@wharton.upenn.edu>]

Dear statalist users,
Suppose I have the following model in which I regress people's  
decision to buy or not to buy something on people's characteristics  
interacted with distance.
(the Xs refer to interactions between distance to the store and other  
people's characteristics).

logit choice dist dist2 ageXdist sexXdist incXdist

And I would like to obtain predicted probabilities for each person  
when distance is set to 10.

This would be easy enough if I only had this model specification. But  
I have several possible models (and may keep adding and changing the  
current ones).

This is what I have so far:


local chars "sex age inc"
foreach varname in `chars'{
	gen distX`varname' = dist*`varname'
}	
gen dist2= dist*dist

*model 1
logit choice dist dist2 ageXdist sexXdist incXdist

*model 2
logit choice dist dist2  sexXdist incXdist

*model 3
logit choice dist ageXdist  incXdist

My question is then: Is it possible to write code general enough that  
would calculate predicted probabilities for when distance is set to 10  
for *any* of the above models?


Any insights are appreciated.
Thanks,
Ana
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/