st: xtpois still maximizing after 1200 iterations

[Scott Cunningham <scunning@gmail.com>]

I'm regressing non-negative integer (# of recent partners in last  
twelve months) onto a few covariates, but only when I include the  
year dummies (i.year) does xtpois have trouble reaching a maximum.   
It appears stuck - after 1200 iterations, it's still going, and it  
seems not to be making any progress.

Can I tell Stata to quit after, say, 2000 iterations or something  
like that?  Or should I interpret the failure to maximize with  more  
caution and try something different?  Is there an algorhthm I could  
use that will make it step to the max easier - like BHHH or something  
like that?

Any help is much appreciated.


scott cunningham
dept. of economics
university of georgia
athens, ga
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