st: sqreg and 2sls

["roy wada" <roywada@hotmail.com>]

Velma wants to know how to achieve convergence when using sqreg.

> I am interested in performing sqreg on a huge data on house price 
> transactions
> and marketing duration. My problem is that the model does not seem to 
> converge.
>  And I keep on getting the note "convergence not achieved" and then the 
> results
> are printed......Can someone please tell me how reliable are these results 
> and what
> can I do to overcome this problem.
-help qreg- says the option -wlsiter(#)- should improve convergence. [R] 
qreg should provide some backgroud on the logic behind combining quantile 
regression and 2sls.

A quick search of the archive shows that the convergence problem with sqreg 
has been previously reported without resolution. I would suggest Velma 
examine the iteration log (under the option -log-) before contacting the 
help desk at Stata Corp.

st: Quantile Regression Convergence not achieved
www.stata.com/statalist/archive/2005-09/msg00746.html

st: qreg: # of replications and covergence
www.stata.com/statalist/archive/2006-04/msg01081.html

Re: st: No convergance?
www.stata.com/statalist/archive/2005-12/msg00548.html

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