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Re: st: Trouble with mixlogit (error) with binary dependent variable
From
Arne Risa Hole <[email protected]>
To
[email protected]
Subject
Re: st: Trouble with mixlogit (error) with binary dependent variable
Date
Wed, 30 Jan 2013 11:36:42 +0000
Sam
-mixlogit- is a user-written command available from SJ/SSC.
You've defined the group variable incorrectly - this should be an
identifier of the choice sets, not the alternatives within a choice
set. See the examples in
http://www.stata-journal.com/article.html?article=st0133.
There might be other problems with the way you've set up the data too
but this is hard to know without seeing a snippet of the data. Have
you tried running the model using -clogit- first? If this doesn't work
you can be 100% sure that -mixlogit- won't either.
Arne (author of -mixlogit-)
On 30 January 2013 00:55, SAM MCCAW <[email protected]> wrote:
> Dear STATA gurus,
>
> I am having trouble running a mixed logit model. Please help!
>
> - The dependent variable is binary (0,1) (innovation).
>
> - My independent variables (var1 var2 var3) are continuous variables
> (they are logs of a count, excluding 0).
>
> -The group variable just takes a value of 1 or 2, because I only have
> two choice occasions, using: egen group = group(innov_1)
>
> - Code: mixlogit innov, group(group) rand(var1 var2 var3) id(id) or
>
> mixlogit innov var4, group(group) rand(var1 var2 var3 var5) id(id)
>
> I am getting the following errors:
>
> [P] error . . . . . . . . . . . . . . . . . . . . . . . . Return code 2000
> no observations;
> You have requested some statistical calculation and there are
> no observations on which to perform it. Perhaps you specified
> if exp or in range and inadvertently filtered all the data.
>
> (end of search)
>
> I have over 30,000 for all the variables specified in the simplest
> model I ran and I still get the same error.
>
> Here are the sumamry statistics for my variables:
>
> Variable | Obs Mean Std. Dev. Min Max
> -------------+--------------------------------------------------------
> innov_1 | 32523 .4774467 .4994988 0 1
> var1 | 33065 2.104231 1.589854 0 4.859812
> var2 | 33065 1.669999 1.0031 0 4.060443
> var3 | 33065 .6736071 .9022467 0 3.78419
> var4 | 33065 2.141496 2.795201 0 9.953027
> -------------+--------------------------------------------------------
> var5 | 28893 1.506202 .9606917 0 3.295837
> var6 | 5953 -2.335463 1.106637 -4.60517 1.96611
>
> I am completely lost about what to do next.
>
> Thanks for your help.
>
> SAM
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