hello? I am a novice to STATA.
After conjoint analysis, A problem occurred during Latent Class Analysis.
There are 6 conjoint properties (program, accessibility, accommodation type, facilities, privacy, price), and the levels are pro(3 levels), acc(3), stay(3), fac(3), privacy(2), price(3).
I used STATA 14.
ㅇ The command syntax is like this : lclogit choice pro pro1 acc stay stay1 fac fac1 privacy price, group(gid) id(pid) ncl(2) member(gender married household disease)
- Independent variable: choice
- Dependent variable: pro pro1 acc stay stay1 fac fac1 privacy price
- memberships : gender married household disease
ㅇ An error message appears like this: 3,000 (group size) take 1,000 (# positives) combinations results in numeric overflow; computations cannot proceed
r(1400);
error message description is like this
error. . . . . . . . . . . . . . . . . . . . . . . . return code 1400
numerical overflow;
You have attempted something that, in the midst of the
necessary calculations, has resulted in something too large
for Stata to deal with accurately. Most commonly, this is
an attempt to estimate a model (say with regress) with more
than 2,147,483,647 effective observations. This effective
number could be reached with far fewer observations if you
were running a frequency-weighted model.
I changed different memberships and did it again and again, I got the same results.
Please advise me from the seniors.
thank you
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