st: Re: mlogit constraint

[baum <baum@bc.edu>]

--On Saturday, September 21, 2002 2:33 -0400 Hannah wrote:

> cons def 1 (par)earn1=earn2
> cons def 2 (par)earn2=earn3
> mlogit par edu race earn*, cons (1-2)
>
> However, the response I have received is either 'invalid syntax' or earn*
> is  completely 'dropped' from the multinomial logit equation. I am really
> hoping  anyone who have been working on 'constraint' issues could share
> some their  experiences with me, and better if you could offer some
> suggestions.
Invalid syntax it is. There is no form of the constraint command in which 
parentheses may be used as in  cons def 1 (par)earn1=earn2
I believe this should just be
cons def 1 earn1=earn2
and so on. There is a syntax, as indicated in help mlogit, in which 
[varname] with square brackets may be used in the constraint command. But 
(varname) is not valid in any context.

Kit
________________________________________________________________________
Christopher F Baum, Boston College Economics, Chestnut Hill MA 02467 USA
baum@bc.edu                       http://fmwww.bc.edu/ec-v/baum.fac.html
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