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st: How to solve this problem when running separate regression using stasby or looping


From   Quang Nguyen <quangn@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: How to solve this problem when running separate regression using stasby or looping
Date   Thu, 7 May 2009 05:27:29 -1000

 Dear All,

I would like to run separate estimation equations for each individual.
Using the _stasby_ command such as:

statsby, by(id): nl (reward=y^{alpha=1}*{beta=0.6}*exp(-{r=0.1}*t))

Stata doesn't work since there missing value or inconvergence for some
individuals. Using the loop such as:

forval i = 1(1)184
{
nl (reward=y^{alpha=1}*{beta=0.6}*exp(-{r=0.1}*t)) if id==`i'
}

The same thing happens.

Can you suggest me a solution so that Stata can go on with the
estimation for all "estimable" individuals and assign missing value to
the case with inconergence or missing value?

Many thanks!
--
"My father gave me the greatest gift anyone could give another person,
he believed in me." - Jim Valvano

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