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st: -mixlogit- numeric overflow
From
"Filippo Maria D'Arcangelo" <[email protected]>
To
[email protected]
Subject
st: -mixlogit- numeric overflow
Date
Tue, 5 Nov 2013 12:09:11 +0100 (CET)
Dear statalisters,
I'm running a mixed logit following Hole (2007) [http://www.stata-journal.com/sjpdf.html?articlenum=st0133].
I have a dataset of 24000 observations, that is 1000 individuals, 8 choice situations and 3 alternatives per situation (i.e. 1000 * 8 * 3 = 24000).
As soon as I run -mixlogit- with 7 independent variables (almost equally divided in the [indepvar] and rand(varlist) places) I receive the following error:
> 3000 (group size) take 1000 (# positives) combinations results in numeric overflow; computations cannot proceed
I keep on receiving the error, no matter how I rearrange the covariates (or if I reduce them). I get the same message even if I reduce the number of observations.
I even tried to use the option [form] with a vector as a starting point with the mean of the covariates as per Hole (2007).
Any suggestion?
Filippo Maria D'Arcangelo
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