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st: regoprob: no observations
I am running a random effects generalized ordered probit model using REGOPROB and the program stopped:
Fitting constant-only model:
Iteration 0: log likelihood = -18923.984
Iteration 1: log likelihood = -16032.199 (not concave)
Iteration 2: log likelihood = -15313.125
Iteration 3: log likelihood = -14986.705
end of do-file
My data have three years and about 17000 observations. The file runs fine when GOLOGIT2 is used. It is not a balanced panel, but I highly suspect if this is the problem since I have run another model using about the same data set (but with 8 years and 27000 observations).
Any ideas why this could happen and how this could be fixed would be greatly appreciated.
Thank you in advance,
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