Xtmelogit - very long calculation time, any solution?

[Giorgio Piccitto]

Dear all,

I am new to multilevel modeling and I am struggling with it on Stata.

Specifically, I am trying to estimate a three-level hierarchical model (50.000 cases) with an interaction and a random slope.

The process it is extremely long, more or less half an hour to obtain the first output after "refining starting values". I do not know how many time it would take to estimate the model and having the estimations.

Is it normal? Does it exist a procedure that could make the process quicker?

Thanks a lot, best, G

[Dario Maimone Ansaldo Patti]

Yes. It takes a huge amount of time, as your sample size is large. I have been struggling with melogit and a sample size of about 80,000 observation. Unfortunately I am not aware of any method to speed up the estimation