> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of joe J.
> Sent: Sunday, December 05, 2004 5:22 AM
> To: [email protected]
> Subject: st: Constraining All variables
>
> Dear Statalisters,
> I am estimating three equations in a frontier analysis. The last two
> equations regress ,respectively, mean and variance of the inefficiency on
> the same set of variables. I want to constrain the coefficients to be
> equal
> across these two equations. However,using the constraint function in
> stata,
> only the coefficient for the first variable is made equal.
>
> I can illustrate the problem using sureg programme.
<snip>
How something like:
use http://www.ats.ucla.edu/stat/stata/notes/hsb2, clear
local i = 1
foreach var in math science write _cons {
constraint define `i' [read]`var' = [socst]`var'
local const "`const' `i' "
local i = `i' + 1
}
disp "`const'"
sureg (read math science write) (socst math science write), const("`const'")
Scott
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
