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st: intreg iteration not concave


From   "Cong, Ze" <zecong@prgs.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: intreg iteration not concave
Date   Sun, 13 Mar 2005 16:24:41 -0800

I am using 'intreg' command, but it was told that it's not concave in Iteration 3 and 4.
The thing is that STATA still gives regression results. 
To what extent are thses results reliable? Can I use them?

Another question is that 'intreg' can deal with cencored data. In my case, all the data are right cencored.
So in this case, the 'var2' in intreg are set to missing.Is that correct? 
Is all right cencored data a real problem in 'intreg'?

Thank you!
Ze

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